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Well Explained.. Appreciated…
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Remote site network design considerations
There are number of considerations which are very important for remote site network designs. Below are important questions for green field network design for a new remote site. 1. Number of users onsite :– Require to select a LAN switch. 2. NIC capacity of user’s machines: – 100Mbps/1Gig — Require to select a LAN…
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Tacacs Port on firewall
If you have firewall in between your client(network device switch,rotuer etc. ) and Tacacs server then you need open TCP 49 port on the firewall.
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Data center – DD questionnaire
Few questions are listed below which are important for the Data center DD. WAN links and its bandwidth and current utilization Number of server ports – 1gig/10gig Number of servers:- physical and virtual Number of server chassis:- Number of vlans and related SVIs:- Intranet and internet traffic flow Number of load balancers – internal &…
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What is DAI( dynamic arp inspection)?
DAI validated the ARP packets in a network. DAI only perform the inspection or checking only on untrusted ports and will not perform inspection on trusted ports. when switch receives a ARP packet on a trusted interface, then it forwards the packet without any inspection or checks. DAI only allow the ARP only if source…
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What is the reserved mac address for outer unknown unicast destnation in fabricpath?
010F.FFC1.01C0 is the reserved mac address for unknown unicast traffic.
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Fabricpath ECMP hashing functions
Cisco FabricPath switches support ECMP forwarding for known unicast frames. If the destination switch ID can be reached through more than one output interface with equal cost, the forwarding engine uses a hash function to pick one of the interfaces. Below are the hashing methods:- 1. Source parameters (layer-3, layer-4, or mixed). 2. Destination parameters…
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%STP-2-L2GW_BACKBONE_BLOCK
A superior BPDU was received on a Cisco FabricPath edge port.
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Advantage of Fabricpath
Below are fabricpath advantages:- 1. MAC address scalability with conversational learning 2. loop mitigation with TTL in the frame field 3. Spanning Tree Protocol independence 4. Remove Suboptimal path. 5. All uplink are in forwarding state. 6. Equal cost multipathing
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What is ip directed-broadcast?
Network Broadcast generated by a host which is not the part of the destination broadcast network. For example, host with ip 10.1.1.10/24 is generating traffic for 192.168.1.255/24. The intermediate routers are forwrding the packet as they do for unicast packet. It can lead to smurf(DoS) attacks and hence it is suggested to dsiable it. It…