ExtremeSwitching (VSP)

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  • 1.  VSP7400 vIST suppression not working

    Posted 12-23-2021 09:58
    I'm testing a configuration to suppress the vIST subnet from being redistributed through ISIS. After applying this configuration I am still seeing the subnet being learned on other VSPs. From all the documentation I've read, this should be a fairly simple configuration... Here is the config I have applied to both VSPs.

    vlan create 2600 name "vIST" type port 0
    vlan i-sid 2600 102600
    interface vlan 2600
     ip address 10.82.255.1 255.255.255.0
     exit
    ip prefix-list VIST-SUBNET 10.82.255.0/24
     route-map SUPPRESS-VIST 1
     match network VIST-SUBNET
     no permit
     enable
    route-map SUPPRESS-VIST 2
     permit
     enable
    router isis
     redistribute direct route-map "SUPPRESS-VIST"
     exit


  • 2.  RE: VSP7400 vIST suppression not working

    Posted 12-23-2021 11:28
    Looks like you are missing the "match protocol local" commands.

    https://extremeportal.force.com/ExtrArticleDetail?an=000080223&q=supress%20vIST


  • 3.  RE: VSP7400 vIST suppression not working

    Posted 12-23-2021 11:45
    Is that required? Based on the "SPBVOSS_TCG_CG.pdf" from March 2020 example, it isn't.




  • 4.  RE: VSP7400 vIST suppression not working

    Posted 12-23-2021 11:56
    Edited by Paul A. Leroux 12-23-2021 12:00
    The SPBm_TCG may had been updated in March 2020.  But it hasn't been truly over hauled in a very long.  We plan on doing a big document clean up in 2022. 

    Some of those command and designs are still be referencing the ERS8800 and VSP9000 and VSP7024. 

    The article I posted above is for VOSS and just updated in 2019.



  • 5.  RE: VSP7400 vIST suppression not working

    Posted 12-23-2021 12:04
    In your example, the 1st route map entry should block anything matching the referenced prefix list. That looks just like mine. The 2nd part of your example seems to permit local routes, but mine are already being learned so I don't believe that should be necessary.

    VSP 4000(config)#ip prefix-list IST 10.28.1.4/30

    VSP 4000 (config)#route-map suppressIST 1
    VSP 4000 (route-map)#no permit  
    VSP 4000 (route-map)#enable
    VSP 4000 (route-map)#match network "IST"
    VSP 4000 (route-map)#exit

    VSP 4000 (config)#route-map suppressIST 2
    VSP 4000 (route-map)#enable
    VSP 4000 (route-map)#match protocol local  
    VSP 4000 (route-map)#exit



  • 6.  RE: VSP7400 vIST suppression not working

    Posted 12-23-2021 12:21
    Edited by Paul A. Leroux 12-23-2021 12:26
    I understand. Your call. Only trying to help and point out something different that I noticed.

    I would just trust the GTAC KB written 2 years ago versus a 12 year old document.  That TCG was written with VOSS devices running v3 and v4.

    And I will just point out again that the document isn't explicit that those code examples aren't from an ERS8800 or VSP9000. 



  • 7.  RE: VSP7400 vIST suppression not working
    Best Answer

    Posted 12-28-2021 16:10
    Turns out I just had to re-apply the redistribution by re-entering the "isis apply redistribute direct" command.