R1:-
interface
Loopback0
Loopback0
ip address 1.1.1.1 255.255.255.255
interface
FastEthernet0/0
FastEthernet0/0
description ” Connected to R2″
ip address 12.12.12.1 255.255.255.0
no
shut
shut
interface
FastEthernet0/1
FastEthernet0/1
description ” Connected to R3″
ip address 13.13.13.1 255.255.255.0
no shut
interface
FastEthernet2/0
FastEthernet2/0
description ” Connected to PC1″
ip address 10.1.1.1 255.255.255.0
no
shut
shut
router
bgp 1
bgp 1
no synchronization
bgp log-neighbor-changes
network 10.1.1.0 mask 255.255.255.0
neighbor 12.12.12.2 remote-as 1
neighbor 13.13.13.3 remote-as 1
R1#sh
ip route 20.1.1.1
ip route 20.1.1.1
Routing
entry for 20.1.1.0/24
entry for 20.1.1.0/24
Known via “bgp 1”, distance 200,
metric 0
metric 0
Tag 2, type internal
Last update from 12.12.12.2 01:58:18 ago
Routing Descriptor Blocks:
* 12.12.12.2, from 12.12.12.2, 01:58:18 ago //Best path
Route metric is 0, traffic share count is
1
1
AS Hops 1
Route tag 2
MPLS label: none
After local preference
command
command
R1#sh
ip bgp
ip bgp
BGP
table version is 22, local router ID is 1.1.1.1
table version is 22, local router ID is 1.1.1.1
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network
Next Hop Metric LocPrf Weight Path
Next Hop Metric LocPrf Weight Path
*>
10.1.1.0/24 0.0.0.0 0 32768 i
10.1.1.0/24 0.0.0.0 0 32768 i
*
i20.1.1.0/24 12.12.12.2 0 50 0 2 I
// LP set on R2
i20.1.1.0/24 12.12.12.2 0 50 0 2 I
// LP set on R2
*>i 13.13.13.3 0 100
0 2 I // LP set on R3
0 2 I // LP set on R3
R1#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected,
Loopback0
Loopback0
10.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 10.1.1.0/24 is directly connected,
FastEthernet2/0
FastEthernet2/0
L 10.1.1.1/32 is directly connected,
FastEthernet2/0
FastEthernet2/0
12.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 12.12.12.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 12.12.12.1/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
13.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 13.13.13.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 13.13.13.1/32 is directly connected,
FastEthernet0/1
FastEthernet0/1
20.0.0.0/24 is subnetted, 1 subnets
B
20.1.1.0 [200/0] via 13.13.13.3, 00:18:59
20.1.1.0 [200/0] via 13.13.13.3, 00:18:59
R2:-
interface
Loopback0
Loopback0
ip address 2.2.2.2 255.255.255.255
interface
FastEthernet0/0
FastEthernet0/0
description ” Connected to R1″
ip address 12.12.12.2 255.255.255.0
no
shut
shut
interface
FastEthernet1/0
FastEthernet1/0
description ” Connected to R5″
ip address 25.25.25.2 255.255.255.0
no shut
router
bgp 1
bgp 1
no synchronization
bgp router-id 2.2.2.2
bgp log-neighbor-changes
neighbor 12.12.12.1 remote-as 1
neighbor 12.12.12.1 next-hop-self
neighbor 12.12.12.1 route-map SET_LP
out
out
neighbor 25.25.25.5 remote-as 2
route-map
SET_LP permit 10
SET_LP permit 10
set local-preference 50
R3:-
interface
Loopback0
Loopback0
ip address 3.3.3.3 255.255.255.255
interface
FastEthernet0/1
FastEthernet0/1
description
” Connected to R1″
” Connected to R1″
ip address 13.13.13.3 255.255.255.0
no
shut
shut
interface
FastEthernet1/0
FastEthernet1/0
description
” Connected to R4″
” Connected to R4″
ip address 34.34.34.3 255.255.255.0
no
shut
shut
router
bgp 1
bgp 1
no synchronization
bgp router-id 3.3.3.3
bgp log-neighbor-changes
neighbor 13.13.13.1 remote-as 1
neighbor 13.13.13.1 next-hop-self
neighbor 13.13.13.1 route-map SET_LP out
neighbor
34.34.34.4 remote-as 2
34.34.34.4 remote-as 2
no auto-summary
route-map
SET_LP permit 10
SET_LP permit 10
set local-preference 100
R4:-
interface
FastEthernet0/1
FastEthernet0/1
description
” Connected to R6″
” Connected to R6″
ip address 46.46.46.4 255.255.255.0
no
shut
shut
interface
FastEthernet1/0
FastEthernet1/0
description
” Connected to R3″
” Connected to R3″
ip address 34.34.34.4 255.255.255.0
no
shut
shut
router
bgp 2
bgp 2
no synchronization
bgp log-neighbor-changes
neighbor 34.34.34.3 remote-as 1
neighbor 46.46.46.6 remote-as 2
neighbor 46.46.46.6 next-hop-self
no auto-summary
!
R5:-
interface
Loopback0
Loopback0
ip address 5.5.5.5 255.255.255.255
interface
FastEthernet0/0
FastEthernet0/0
description
” Connected to R6″
” Connected to R6″
ip address 56.56.56.5 255.255.255.0
no
shut
shut
interface
FastEthernet1/0
FastEthernet1/0
description
” Connected to R2″
” Connected to R2″
ip address 25.25.25.5 255.255.255.0
no
shut
shut
router
bgp 2
bgp 2
no synchronization
bgp log-neighbor-changes
neighbor 25.25.25.2 remote-as 1
neighbor 56.56.56.6 remote-as 2
neighbor 56.56.56.6 next-hop-self
no auto-summary
R6:-
interface
Loopback0
Loopback0
ip address 6.6.6.6 255.255.255.255
interface
FastEthernet0/0
FastEthernet0/0
description
” Connected to R5″
” Connected to R5″
ip address 56.56.56.6 255.255.255.0
no
shut
shut
interface
FastEthernet0/1
FastEthernet0/1
description
” Connected to R4″
” Connected to R4″
ip address 46.46.46.6 255.255.255.0
no
shut
shut
interface
FastEthernet2/0
FastEthernet2/0
description
” Connected to PC2″
” Connected to PC2″
ip address 20.1.1.1 255.255.255.0
no shut
router
bgp 2
bgp 2
no synchronization
bgp log-neighbor-changes
network 20.1.1.0 mask 255.255.255.0
neighbor 46.46.46.4 remote-as 2
neighbor 56.56.56.5 remote-as 2
no auto-summary
R6#sh
ip bgp sum
ip bgp sum
BGP
router identifier 6.6.6.6, local AS number 2
router identifier 6.6.6.6, local AS number 2
BGP
table version is 8, main routing table version 8
table version is 8, main routing table version 8
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
3
path entries using 156 bytes of memory
path entries using 156 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 684 total bytes of memory
using 684 total bytes of memory
BGP
activity 3/1 prefixes, 9/6 paths, scan interval 60 secs
activity 3/1 prefixes, 9/6 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
46.46.46.4 4 2 199
194 8 0
0 02:54:07 1
194 8 0
0 02:54:07 1
56.56.56.5 4 2 201
196 8 0
0 02:54:17 1
196 8 0
0 02:54:17 1
R6#sh
ip bgp
ip bgp
BGP
table version is 8, local router ID is 6.6.6.6
table version is 8, local router ID is 6.6.6.6
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*
i10.1.1.0/24 56.56.56.5 0
100 0 1 i
i10.1.1.0/24 56.56.56.5 0
100 0 1 i
*>i 46.46.46.4 0 100
0 1 i
0 1 i
*>
20.1.1.0/24 0.0.0.0 0 32768 i
20.1.1.0/24 0.0.0.0 0 32768 i
R6#sh
ip rou
ip rou
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [200/0] via 46.46.46.4,
01:44:35
01:44:35
20.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 20.1.1.0/24 is directly connected,
FastEthernet2/0
FastEthernet2/0
L 20.1.1.1/32 is directly connected,
FastEthernet2/0
FastEthernet2/0
46.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 46.46.46.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 46.46.46.6/32 is directly connected, FastEthernet0/1
56.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 56.56.56.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 56.56.56.6/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
After Maximum path
command
command
router
bgp 2
bgp 2
maximum-paths
ibgp 2
ibgp 2
R6#sh
ip bgp
ip bgp
BGP
table version is 9, local router ID is 6.6.6.6
table version is 9, local router ID is 6.6.6.6
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*mi10.1.1.0/24 56.56.56.5 0 100
0 1 i
0 1 i
*>i 46.46.46.4 0 100
0 1 i
0 1 i
*>
20.1.1.0/24 0.0.0.0 0
32768 i
20.1.1.0/24 0.0.0.0 0
32768 i
R6#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1
– OSPF external type 1, E2 – OSPF external type 2
– OSPF external type 1, E2 – OSPF external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B
10.1.1.0 [200/0] via 56.56.56.5, 00:00:09
10.1.1.0 [200/0] via 56.56.56.5, 00:00:09
[200/0] via 46.46.46.4,
00:00:09
00:00:09
20.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 20.1.1.0/24 is directly connected,
FastEthernet2/0
FastEthernet2/0
L 20.1.1.1/32 is directly connected,
FastEthernet2/0
FastEthernet2/0
46.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 46.46.46.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 46.46.46.6/32 is directly connected,
FastEthernet0/1
FastEthernet0/1
56.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 56.56.56.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 56.56.56.6/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
R6#sh
ip route 10.1.1.1
ip route 10.1.1.1
Routing
entry for 10.1.1.0/24
entry for 10.1.1.0/24
Known via “bgp 2”, distance 200,
metric 0
metric 0
Tag 1, type internal
Last update from 46.46.46.4 00:00:13 ago
Routing Descriptor Blocks:
* 56.56.56.5, from 56.56.56.5, 00:00:13 ago
Route metric is 0, traffic share count is
1
1
AS Hops 1
Route tag 1
MPLS label: none
46.46.46.4, from 46.46.46.4, 00:00:13 ago
Route metric is 0, traffic share count is
1
1
AS Hops 1
Route tag 1
MPLS label: none
R6#
PC1:-
PC1>
show ip
show ip
NAME : PC1[1]
IP/MASK : 10.1.1.10/24
GATEWAY : 10.1.1.1
DNS :
MAC : 00:50:79:66:68:00
LPORT : 10003
RHOST:PORT : 127.0.0.1:10002
MTU: : 1500
PC2:-
PC2>
show ip
show ip
NAME : PC2[1]
IP/MASK : 20.1.1.10/24
GATEWAY : 20.1.1.1
DNS :
MAC : 00:50:79:66:68:00
LPORT :
10003
10003
RHOST:PORT : 127.0.0.1:10002
MTU: : 1500
Verification:-
R1:-
R1#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected,
Loopback0
Loopback0
10.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 10.1.1.0/24 is directly connected,
FastEthernet2/0
FastEthernet2/0
L 10.1.1.1/32 is directly connected,
FastEthernet2/0
FastEthernet2/0
12.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 12.12.12.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 12.12.12.1/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
13.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 13.13.13.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 13.13.13.1/32 is directly connected,
FastEthernet0/1
FastEthernet0/1
20.0.0.0/24 is subnetted, 1 subnets
B
20.1.1.0 [200/0] via 12.12.12.2, 00:10:52 //best path is selected as per
selection criteria, lowest router ID.
20.1.1.0 [200/0] via 12.12.12.2, 00:10:52 //best path is selected as per
selection criteria, lowest router ID.
R1#sh
ip bgp summ
ip bgp summ
BGP
router identifier 1.1.1.1, local AS number 1
router identifier 1.1.1.1, local AS number 1
BGP
table version is 18, main routing table version 18
table version is 18, main routing table version 18
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
3
path entries using 156 bytes of memory
path entries using 156 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 684 total bytes of memory
using 684 total bytes of memory
BGP
activity 3/1 prefixes, 9/6 paths, scan interval 60 secs
activity 3/1 prefixes, 9/6 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
12.12.12.2 4 1 84
83 18 0
0 01:11:37 1
83 18 0
0 01:11:37 1
13.13.13.3 4 1 192
187 18 0
0 02:47:10 1
187 18 0
0 02:47:10 1
R1#sh
ip bgp neighbors | in router
ip bgp neighbors | in router
BGP version 4, remote router ID 2.2.2.2
BGP version 4, remote router ID 3.3.3.3
R1#
R2:-
R2#sh
ip bgp summ
ip bgp summ
BGP
router identifier 2.2.2.2, local AS number 1
router identifier 2.2.2.2, local AS number 1
BGP
table version is 5, main routing table version 5
table version is 5, main routing table version 5
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
2
path entries using 104 bytes of memory
path entries using 104 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 632 total bytes of memory
using 632 total bytes of memory
BGP
activity 11/9 prefixes, 11/9 paths, scan interval 60 secs
activity 11/9 prefixes, 11/9 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
12.12.12.1 4 1 91
91 5
0 0 01:18:12 1
91 5
0 0 01:18:12 1
25.25.25.5 4 2 103
103 5 0
0 01:29:21 1
103 5 0
0 01:29:21 1
R2#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [200/0] via 12.12.12.1,
01:18:15
01:18:15
12.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 12.12.12.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 12.12.12.2/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
20.0.0.0/24 is subnetted, 1 subnets
B 20.1.1.0 [20/0] via 25.25.25.5,
01:28:27
01:28:27
25.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 25.25.25.0/24 is directly connected,
FastEthernet1/0
FastEthernet1/0
L 25.25.25.2/32 is directly connected,
FastEthernet1/0
FastEthernet1/0
R2#sh
ip bgp
ip bgp
BGP
table version is 5, local router ID is 2.2.2.2
table version is 5, local router ID is 2.2.2.2
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*>i10.1.1.0/24 12.12.12.1 0 100
0 i
0 i
*>
20.1.1.0/24 25.25.25.5 0 2 i
20.1.1.0/24 25.25.25.5 0 2 i
R2#
R3:-
R3#sh
ip bgp summ
ip bgp summ
BGP
router identifier 3.3.3.3, local AS number 1
router identifier 3.3.3.3, local AS number 1
BGP
table version is 5, main routing table version 5
table version is 5, main routing table version 5
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
2
path entries using 104 bytes of memory
path entries using 104 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 632 total bytes of memory
using 632 total bytes of memory
BGP
activity 3/1 prefixes, 3/1 paths, scan interval 60 secs
activity 3/1 prefixes, 3/1 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
13.13.13.1 4 1 195
200 5 0
0 02:54:20 1
200 5 0
0 02:54:20 1
34.34.34.4 4
2 114
115 5 0
0 01:39:35 1
2 114
115 5 0
0 01:39:35 1
R3#sh
ip bgp
ip bgp
BGP
table version is 5, local router ID is 3.3.3.3
table version is 5, local router ID is 3.3.3.3
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*>i10.1.1.0/24 13.13.13.1 0 100
0 i
0 i
*>
20.1.1.0/24 34.34.34.4 0 2 i
20.1.1.0/24 34.34.34.4 0 2 i
R3#sh
ip rou
ip rou
R3#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [200/0] via 13.13.13.1,
02:46:32
02:46:32
13.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 13.13.13.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 13.13.13.3/32 is directly connected,
FastEthernet0/1
FastEthernet0/1
20.0.0.0/24 is subnetted, 1 subnets
B 20.1.1.0 [20/0] via 34.34.34.4,
01:39:41
01:39:41
34.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 34.34.34.0/24 is directly connected,
FastEthernet1/0
FastEthernet1/0
L 34.34.34.3/32 is directly connected,
FastEthernet1/0
FastEthernet1/0
R3#
R4:-
R4#sh
ip bgp summ
ip bgp summ
BGP
router identifier 4.4.4.4, local AS number 2
router identifier 4.4.4.4, local AS number 2
BGP
table version is 5, main routing table version 5
table version is 5, main routing table version 5
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
2
path entries using 104 bytes of memory
path entries using 104 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 632 total bytes of memory
using 632 total bytes of memory
BGP
activity 3/1 prefixes, 3/1 paths, scan interval 60 secs
activity 3/1 prefixes, 3/1 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
34.34.34.3 4 1 115
115 5 0
0 01:40:07 1
115 5 0
0 01:40:07 1
46.46.46.6 4 2 189
194 5 0
0 02:49:43 1
194 5 0
0 02:49:43 1
R4#sh
ip bgp
ip bgp
BGP
table version is 5, local router ID is 4.4.4.4
table version is 5, local router ID is 4.4.4.4
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*>
10.1.1.0/24 34.34.34.3 0 1 i
10.1.1.0/24 34.34.34.3 0 1 i
*>i20.1.1.0/24 46.46.46.6 0 100
0 i
0 i
R4#sh
ip rou
ip rou
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 –
OSPF NSSA external type 2
OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [20/0] via 34.34.34.3,
01:40:11
01:40:11
20.0.0.0/24 is subnetted, 1 subnets
B 20.1.1.0 [200/0] via 46.46.46.6,
02:45:21
02:45:21
34.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 34.34.34.0/24 is directly connected,
FastEthernet1/0
FastEthernet1/0
L 34.34.34.4/32 is directly connected,
FastEthernet1/0
FastEthernet1/0
46.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 46.46.46.0/24 is directly connected,
FastEthernet0/1
FastEthernet0/1
L 46.46.46.4/32 is directly connected,
FastEthernet0/1
FastEthernet0/1
R4#
R5:-
R5#sh
ip bgp summ
ip bgp summ
BGP
router identifier 5.5.5.5, local AS number 2
router identifier 5.5.5.5, local AS number 2
BGP
table version is 13, main routing table version 13
table version is 13, main routing table version 13
2
network entries using 256 bytes of memory
network entries using 256 bytes of memory
2
path entries using 104 bytes of memory
path entries using 104 bytes of memory
2/2
BGP path/bestpath attribute entries using 248 bytes of memory
BGP path/bestpath attribute entries using 248 bytes of memory
1
BGP AS-PATH entries using 24 bytes of memory
BGP AS-PATH entries using 24 bytes of memory
0
BGP route-map cache entries using 0 bytes of memory
BGP route-map cache entries using 0 bytes of memory
0
BGP filter-list cache entries using 0 bytes of memory
BGP filter-list cache entries using 0 bytes of memory
BGP
using 632 total bytes of memory
using 632 total bytes of memory
BGP
activity 7/5 prefixes, 7/5 paths, scan interval 60 secs
activity 7/5 prefixes, 7/5 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer
InQ OutQ Up/Down State/PfxRcd
InQ OutQ Up/Down State/PfxRcd
25.25.25.2 4 1 106
105 13 0
0 01:31:33 1
105 13 0
0 01:31:33 1
56.56.56.6 4 2 192
198 13 0
0 02:50:58 1
198 13 0
0 02:50:58 1
R5#sh
ip bgp
ip bgp
BGP
table version is 13, local router ID is 5.5.5.5
table version is 13, local router ID is 5.5.5.5
Status
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure, S Stale, m
multipath, b backup-path, x best-external
multipath, b backup-path, x best-external
Origin
codes: i – IGP, e – EGP, ? – incomplete
codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
*>
10.1.1.0/24 25.25.25.2 0 1 i
10.1.1.0/24 25.25.25.2 0 1 i
*>i20.1.1.0/24 56.56.56.6 0 100
0 i
0 i
R5#sh
ip rou
ip rou
R5#sh
ip route
ip route
Codes:
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O –
OSPF, IA – OSPF inter area
OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF
NSSA external type 2
NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF
external type 2
external type 2
i – IS-IS, su – IS-IS summary, L1 –
IS-IS level-1, L2 – IS-IS level-2
IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate
default, U – per-user static route
default, U – per-user static route
o – ODR, P – periodic downloaded static
route, H – NHRP
route, H – NHRP
+ – replicated route, % – next hop
override
override
Gateway
of last resort is not set
of last resort is not set
5.0.0.0/32 is subnetted, 1 subnets
C 5.5.5.5 is directly connected,
Loopback0
Loopback0
10.0.0.0/24 is subnetted, 1 subnets
B 10.1.1.0 [20/0] via 25.25.25.2,
01:21:49
01:21:49
20.0.0.0/24 is subnetted, 1 subnets
B 20.1.1.0 [200/0] via 56.56.56.6,
02:47:47
02:47:47
25.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 25.25.25.0/24 is directly connected,
FastEthernet1/0
FastEthernet1/0
L 25.25.25.5/32 is directly connected,
FastEthernet1/0
FastEthernet1/0
56.0.0.0/8 is variably subnetted, 2
subnets, 2 masks
subnets, 2 masks
C 56.56.56.0/24 is directly connected,
FastEthernet0/0
FastEthernet0/0
L 56.56.56.5/32 is directly connected,
FastEthernet0/0
FastEthernet0/0
R5#
R6:-
PC1:-
PC1>
ping 20.1.1.10
ping 20.1.1.10
84
bytes from 20.1.1.10 icmp_seq=1 ttl=60 time=109.201 ms
bytes from 20.1.1.10 icmp_seq=1 ttl=60 time=109.201 ms
84
bytes from 20.1.1.10 icmp_seq=2 ttl=60 time=109.202 ms
bytes from 20.1.1.10 icmp_seq=2 ttl=60 time=109.202 ms
84
bytes from 20.1.1.10 icmp_seq=3 ttl=60 time=124.802 ms
bytes from 20.1.1.10 icmp_seq=3 ttl=60 time=124.802 ms
84
bytes from 20.1.1.10 icmp_seq=4 ttl=60 time=124.801 ms
bytes from 20.1.1.10 icmp_seq=4 ttl=60 time=124.801 ms
84
bytes from 20.1.1.10 icmp_seq=5 ttl=60 time=109.202 ms
bytes from 20.1.1.10 icmp_seq=5 ttl=60 time=109.202 ms
PC2:-
PC2>
ping 10.1.1.10
ping 10.1.1.10
84
bytes from 10.1.1.10 icmp_seq=1 ttl=60 time=109.201 ms
bytes from 10.1.1.10 icmp_seq=1 ttl=60 time=109.201 ms
84
bytes from 10.1.1.10 icmp_seq=2 ttl=60 time=109.202 ms
bytes from 10.1.1.10 icmp_seq=2 ttl=60 time=109.202 ms
84
bytes from 10.1.1.10 icmp_seq=3 ttl=60 time=124.802 ms
bytes from 10.1.1.10 icmp_seq=3 ttl=60 time=124.802 ms
84
bytes from 10.1.1.10 icmp_seq=4 ttl=60 time=124.801 ms
bytes from 10.1.1.10 icmp_seq=4 ttl=60 time=124.801 ms
84
bytes from 10.1.1.10 icmp_seq=5 ttl=60 time=109.202 ms
bytes from 10.1.1.10 icmp_seq=5 ttl=60 time=109.202 ms