Routing

Hello- I have multiple VRFs that connect into inet.0 via lt interfaces..all VRFs use dynamic routing with other devices connecting into the VRFs and receving /32 routes. i have a static routes pointed from inet.0 to the peer lt interfaces. Inet.0 then advertises an aggregate  for all VRFs, i.e /21, to the rest of the network.

I need to stop advertising /21 block in case routes in the VRFs go away? i can do this by running a routing protocol between the vrf and inet.0 over the lt interfaces..i was wondering if there's another way to do this so i don't have to keep adding routing adjacencies from VRFs to inet.0.

Hope this makes sense

TIA.

Hello there,

Please have a look at this http://forums.juniper.net/jnet/attachments/jnet/jnetnews/869/1/WC2014_policy_challenge.pdf , it may answer Your questions.

HTH

Thanks

Alex

Thanks! that could potentially work. I have a need to match bunch of /32s and not just one.. wondering if route matchin within the condtion statement supports prefix range etc. i.e if-route-exists 10.1.1.0/23 prefix-length-range /30-/32. 

i havent seen any info on that. 

Hello,

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@juniper321 wrote:

wondering if route matchin within the condtion statement supports prefix range etc. i.e if-route-exists 10.1.1.0/23 prefix-length-range /30-/32. 

 

i havent seen any info on that. 

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The info is right here

http://www.juniper.net/techpubs/en_US/junos13.2/topics/reference/configuration-statement/if-route-exists-edit-policy-options-condition.html

The "address" must be a single network/masklen combination. No support for additional "prefix-range", "longer", "orlonger", "upto"  etc knobs.

If You have a bunch of prefixes to match, use auxuliary policies (one "condition" matching 1 prefix + one auxiliary policy containing said "condition") like in my example and combine them on a policy-chain, possibly with logical expressions.

HTH

Thanks

Alex

Thank you!