Login local on cisco ios xe
I am using the below topology for the segment routing configuration, I will talk about basic segment routing configuration and will not add TE(traffic engineering) for now, for TE will come in the next blog. The above two examples give an excellent clue on how the traffic is steered over the segment routing path in MPLS TE. By this, every transit airport knows where to send the baggage next. Cisco’s baggage transfer example :īaggage tags generally hold the complete route info and are placed on the bags at the beginning of the trip. In this example, the best part is that the guard doesn’t need to remember the path for each kid. The kid has a cap with the labels which indicate direction something like below and now the guard needs to read the label and pop it and send the kid to the label indicated direction. But the kid needs to carry the path info and it is done with the help of sticking labels on the kid’s cap. At every road intersection, we have a guard who can help the kid. I found this example over the internet, where Ron talks about a kindergarten kid who needs to go to his home and he doesn’t know the path. I think I have listed enough here, now let’s get into two very good analogies that I found over the internet and they really helped me to understand the SR operation when TE is configured over SR. Also the best part is the SDN controller based control plane.The prefix sid steers the traffic to the right node and the adj sid steers the traffic to the right adjacency to reach that node.On each router we mention an index value which is carried in the IGP advertisement and the receiving end calculates the label based on index value it has received from the node.It is done on the basis of SRGB (segment routing global block) defined on the router, for example if the SRGB defined on the router is 16000 to 23999 which is also the default SRGB and router receives 5 as index value then the label would be 16005.There are two important components in SR, Prefix-SID and Adjacency SID, with the help of these two we can reach anywhere in the network.As we are using links state routing protocols, we can use IGP FRR in segment routing.
Now the intermediate nodes just have to remove(pop) the labels belonging to them and steer the packet to the node where the next label belongs to.
#LOGIN LOCAL ON CISCO IOS XE HOW TO#
Please check my blog on how to configure GNS3 as a remote server here How to Run GNS3 in Client Server Mode This blog is very close to my heart because this is the first one where the lab is done on my recently built remote GNS3 server.