Surpressing routing advertisements

[MrCisco]

I need to know if it possible to surpress a routing entry when
another route is removed from the routing table. Problem is
this:-

I have 2 locations that need to advertise the same remote network into the core WAN. I have no layer 2 OR Layer 3 Connectivity between locations. One acts are primary one as backup. My Routers are running RIP in/out to the local lan. EIGRP into the main WAN backbone. I have a Static route mapped to the local ethernet interface that is exported into eigrp on both routers. This route must be available at both locations due to NAT requirements. Currently I have applied an offset to EIGRP on the secondary router to ensure that only the primary router advertise the main network during normal conditions. I can recover to the backup site in the event I lose the Circuit to Primary Router, Primary Router fails or the ethernet where the route is mapped to failes. What I cannot account for is not getting a RIP Update from the ethernet attached network.

I need to know if I can remove the route from the primary router if this occurs and advertise the route via the secondary location. Route-maps ??? or metric weighting ? Any suggestions most apprieciated.

 

[katamann]

Hi

I don't really understand how your network topology is. However, it sounds like you're in need of route filters. Does this solve your problem:

access-list 1 permit 1.0.0.0 0.255.255.255
access-list 2 permit 1.2.3.0 0.0.0.255
router rip
distribute-list 2 out ethernet 0
distribute-list 1 out

I recomend reading the whole TAC document at:

http://www.cisco.com/warp/customer/105/34.html

-Katamann

 

[jgercken]

There are a couple ways to do that. Your options are:
a floating static route w/ metric higher than primary route
adjusting routing protocol metrics
fiddle with administrative distances


'I have no layer 2 OR Layer 3 Connectivity between locations' Wha? Then how do they connect to the core? I'm a bit confused. Could you post the relevant portions of your config files? Please describe your physical network layout then the areas where the various routing protocols are being used.
-Jeff ----------------------------------------
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