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IntroductionOSPF, being a link-state protocol, allows for every router in the network to know of every link and OSPF speaker in the entire network. From this picture each router independently runs the Shortest Path First (SPF) algorithm to determine ...
We all know that we our providers require BGP to connect to the internet, but it's not always so clear on how to fit this into the rest of our enterprise. Things get particularly tricky when we want to connect to the internet in different geographic ...
One of the biggest challenges in troubleshooting is understanding expected behavior. If we don't know what it is supposed to look like in the working state, how can we tell if we are in a broken state?In this document we will explore label operations...
The ProblemEnter EVCsHow It Works (Ingress)How It Works (Egress)Step-by-Step ExampleFinal Thoughts The ProblemOn traditional switches whenever we have a trunk interface we use the VLAN tag to demultiplex the VLANs. The switch needs to determine which...
The sheer number of bits in an IPv6 address can make IPv6 subnetting intimidating at best. With the addition of a new addressing scheme it's easy to get lost trying to break up your brand new /48 address across your enterprise.The New Boss, Same as t...
With OSPF the MTU is a field set in the DBD during neighbor establishement. We send small packets only indicating how big our interface MTU is. We can see this in the debugs between the 3750X and the 3850===========================Dec 27 09:42:04.033...
Nicholas- Yes the EVC infrastructure is supported in ASR1k/IOS-XE since 3.2S http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-ether-vc-infra-xe.html
Sherif, you are exactly right. The CAM table will say that the destination mac is out g0/2, service instance 1. Any frame that egresses g0/2, service instance 1 MUST have dot1q tag 18 imposed on to it.
