VSP7400 vIST suppression not working

[bfaltys]

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

[EXTR_Paul]

Looks like you are missing the "match protocol local" commands.

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

[bfaltys]

Is that required? Based on the "SPBVOSS_TCG_CG.pdf" from March 2020 example, it isn't.

[EXTR_Paul]

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.

[bfaltys]

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