12-30-2003 12:12 PM - edited 03-02-2019 12:37 PM
Hi everybody.
I have two Cisco 7200VXR routers connected via ATM-E3 link (PA-A3-E3 cards). Sometimes (approximately once per week) after link down/up flow (CRC level on ATM interface in this short time increase) I have a serious problems with OSPF.
Routers has established neighbor adjancencies:
bazilio>sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
193.254.221.3 1 FULL/BDR 00:00:39 193.125.78.165 FastEthernet0/0.9
193.254.221.4 0 FULL/ - 00:00:35 193.125.78.82 ATM1/0.2
bazilio>
Routers has networks in link state fatabase:
bazilio>sh ip ospf database | inc 193.125.78.208
...
193.125.78.208 193.254.221.4 665 0x80000322 0x0013770
but has no same networks in routing table:
bazilio>sh ip route 193.125.78.208
% Network not in table
In this state OSPF may stay hours. The workaround is "clear ip ospf process" command. This takes place on all IOSes (including 123-3a).
Does anybody know how can I solve this problem ? Does migration from OSPF to EIGRP or IS-IS solve it ?
01-15-2004 01:05 AM
That looks like a bug to me. I would try changing to different code, perhaps the latest mainline 12.2 if it has the features you need.
01-15-2004 06:20 AM
Really, it looks like a bug. I forgot sad that "clear ip ospf process" command is not single solution. Sometimes at night, after link down/up flap event routes disappear from routing table, but some hours later, after second link down/up flap event routes appear in routing table again. I try to roll back to 12.2 IOS code.
01-27-2004 02:42 AM
I changed IOS to 122-15T2 one week ago. OSPF works correct!!!
But sometimes, my PA-A3-E3 ATM subinterface hangs
(ospf switches routes to backup interface). I use shutdown/no shutdown or clear interface atm1/0 as solution. But this is another story :)
01-15-2004 06:02 AM
Here's a shot in the dark - Is there a "distribute-list in" command that blocks that LSA from populating the routing table?
Mark
01-15-2004 06:11 AM
I have no any distribute-lists:
!
router ospf 1
log-adjacency-changes
area 0 authentication message-digest
summary-address 193.125.79.128 255.255.255.240
summary-address 10.21.0.0 255.255.0.0
redistribute connected subnets
redistribute static subnets
passive-interface default
no passive-interface FastEthernet0/0.9
no passive-interface ATM1/0.2
network 193.125.78.80 0.0.0.3 area 0
network 193.125.78.96 0.0.0.31 area 0
network 193.125.78.160 0.0.0.15 area 0
network 193.125.78.232 0.0.0.7 area 0
default-information originate
!
01-03-2004 04:41 AM
Yes. It is the external route. See my previous post.
01-03-2004 04:40 AM
I put configuration of both routers to
01-02-2004 10:03 AM
What is the subnet mask on your interface fastethernet0/0.9? If it overlaps with the the subnet mask for your external route in the LSA 193.125.78.208 advertised by 193.254.221.4 over your WAN link, OSPF may have problems and not run properly.
HTH
Mark
01-03-2004 04:14 AM
Fa0/0.9 has ip address 193.125.78.161 255.255.255.240, ATM1/0.2 193.125.78.81 255.255.255.252. It is not overlap.
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