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  1. Hi Rene,
    Is there any rule to connected other Routing protocol or we can do redistribution any where suppose L1/L2 or L1-L2 Router?? Thanks


  2. Hi Zaman,

    Not really, when you redistribute something into IS-IS you can do it on any router and redistribute into L1, L2 or both L1 and L2.


  3. Hi Rene,
    I have set up a LAB with multiple ISIS Instance/TAG . Then Redistribute those Instances with each other using Route-Map matching Loopback IP’s and TAG value. But I am not getting prefix from R1 and, prefix from R3 whether I configured Instance Redistribution on R2 and R4 .Please check the topology & Configuration attached.ISIS config !!.txt (3.5 KB)




  4. Hello Zaman,

    If you lab up something like this, first try the basic redistribution commands without route-maps or tags (maybe you did).

    I labbed up redistribution between IS-IS processes on IOSv (Cisco VIRL) but whatever I tried, it was impossible to redistribute routes from one process into another. Maybe it’s related to Cisco IOS or the version that I used. The commands are accepted but it doesn’t redistribute anything.

    On IOS XR, it works. Here’s a working configuration for three routers connected like this:


    hostname R1
    interface GigabitEthernet0/
    ... Continue reading in our forum

  5. Hi,
    Thanks Rene for your valuable input . In My LAB Only local connected (Loopback) prefix will not distributed But others prefix distributed fine . In R2 , when redistributed (24 to AREA12) to AREA12 , only prefix not come to AREA12 but all others prefix ( ; redistributed fine . See the output below :

    R1#show ip route 
    Gateway of last resort is not set
 is subnetted, 1 subnets
    C is directly connected, Loopback0
 is subnetted, 1 subnets
    **i L2 [115/30] via, 00:0
    ... Continue reading in our forum

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