[c-nsp] OSPFv3 down every 34 minutes
Eric Van Tol
eric at atlantech.net
Fri Apr 11 10:02:25 EDT 2008
Two seconds after I sent this, I realized that the database refreshes every 30 minutes, so that's likely the "process" that is triggering this. Duh...
In any case, the question now is, what would cause so many neighbors to retransmit and why on only one router?
-evt
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Eric Van Tol
> Sent: Friday, April 11, 2008 9:56 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] OSPFv3 down every 34 minutes
>
> Hi all,
> Wondering if anyone has seen this yet. I recently upgraded a pair of
> 6509s to 12.2(18)SXF13 and since then, one of them seems to lose
> OSPFv3 adjacencies every 34 minutes on the dot. The adjacencies to
> the three other routers on this *one* particular SVI drop due to "too
> many retransmissions". Debug shows nothing particularly useful
> besides "too many retransmits". I've checked configs on both the
> 6509s and the adjacent routers and all looks up-to-snuff. The other
> routers never lose adjacencies with the second 6509 and are all
> coming in across different physical interfaces. MTUs are correct, no
> interface errors or drops, no mis-matched timers, etc. Other
> neighbors have been up for over a week, since I last did a 'clear
> ipv6 ospf process' after updating OSPFv3 priorities.
>
> The outputs below show the 'ipv6 ospf neighbor detail' from the three
> affected neighbors.
>
> The only thing I can think of is that there is a process kicking off
> every 34 minutes on this one 6509, but I can't figure out what it
> could be. I was previously on 12.2(18)SXF3 and this wasn't
> happening. I checked Bug Navigator and couldn't find anything
> concrete or even similar in SXF13.
>
> Any ideas where to look?
>
> Thanks,
> evt
>
> ~~~~~~~~~~~~~~~~~~~~~
>
> interface Vlan2
> ip address x.x.x.x 255.255.255.224
> no ip redirects
> no ip unreachables
> ip ospf authentication-key xxxxxxx
> ip ospf priority 90
> ipv6 address x:x:x:x::/64
> ipv6 enable
> ipv6 ospf priority 5
> ipv6 ospf 600 area 75
> standby 1 ip x.x.x.x
> standby 1 priority 90
> standby 1 preempt
> standby 1 authentication xxxxxx
> !
> Vlan2 is up, line protocol is up
> Hardware is EtherSVI, address is 00d0.02b6.3400 (bia
> 00d0.02b6.3400)
> Internet address is x.x.x.x/27
> MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 17/255, rxload 10/255
> Encapsulation ARPA, loopback not set
> Keepalive not supported
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:00, output 00:00:00, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/16/16 (size/max/drops/flushes); Total output
> drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 42406000 bits/sec, 11880 packets/sec
> 5 minute output rate 68446000 bits/sec, 11553 packets/sec
> L2 Switched: ucast: 1923473851 pkt, 1081449259861 bytes - mcast:
> 1839775 pkt, 193492810 bytes
> L3 in Switched: ucast: 6107349982 pkt, 3277271069494 bytes - mcast:
> 0 pkt, 0 bytes mcast
> L3 out Switched: ucast: 6976977824 pkt, 3721569539249 bytes mcast:
> 0 pkt, 0 bytes
> 6110601771 packets input, 3277564197885 bytes, 0 no buffer
> Received 1829472 broadcasts (0 IP multicasts)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 6980413289 packets output, 3722016274612 bytes, 0 underruns
> 0 output errors, 0 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> !
> sh ipv6 interface vlan 2
> Vlan2 is up, line protocol is up
> IPv6 is enabled, link-local address is FE80::2D0:2FF:FEB6:3400
> Global unicast address(es):
> x:x:x:x:x:x:x:x, subnet is x:x:x:x::/64
> Joined group address(es):
> FF02::1
> FF02::2
> FF02::5
> FF02::6
> FF02::1:FFB6:3400
> FF02::1:FFBC:D102
> MTU is 1500 bytes
> ICMP error messages limited to one every 100 milliseconds
> ICMP redirects are enabled
> ND DAD is enabled, number of DAD attempts: 1
> ND reachable time is 30000 milliseconds
> ND advertised reachable time is 0 milliseconds
> ND advertised retransmit interval is 0 milliseconds
> ND router advertisements are sent every 200 seconds
> ND router advertisements live for 1800 seconds
> Hosts use stateless autoconfig for addresses.
> !
> Neighbor x.x.x.x
> In the area 75 via interface Vlan2
> Neighbor: interface-id 2, link-local address
> FE80::21B:C0FF:FE56:C502
> Neighbor priority is 3, State is FULL, 6 state changes
> DR is x.x.x.9 BDR is x.x.x.8
> Options is 0x56730A1D
> Dead timer due in 00:00:37
> Neighbor is up for 00:10:10
> Index 2/4/4, retransmission queue length 0, number of
> retransmission 0
> First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0)
> Last retransmission scan length is 0, maximum is 0
> Last retransmission scan time is 0 msec, maximum is 0 msec
> Neighbor x.x.x.9
> In the area 75 via interface Vlan2
> Neighbor: interface-id 111, link-local address
> FE80::2D0:4FF:FE48:1400
> Neighbor priority is 10, State is FULL, 6 state changes
> DR is x.x.x.9 BDR is x.x.x.8
> Options is 0x51A5AF75
> Dead timer due in 00:00:30
> Neighbor is up for 00:10:11
> Index 1/3/3, retransmission queue length 0, number of
> retransmission 0
> First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0)
> Last retransmission scan length is 0, maximum is 0
> Last retransmission scan time is 0 msec, maximum is 0 msec
> Neighbor x.x.x.11
> In the area 75 via interface Vlan2
> Neighbor: interface-id 3, link-local address
> FE80::2D0:63FF:FE2F:7800
> Neighbor priority is 1, State is FULL, 6 state changes
> DR is x.x.x.9 BDR is x.x.x.8
> Options is 0x4AB7B4CD
> Dead timer due in 00:00:31
> Neighbor is up for 00:10:18
> Index 3/5/5, retransmission queue length 0, number of
> retransmission 0
> First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0)
> Last retransmission scan length is 0, maximum is 0
> Last retransmission scan time is 0 msec, maximum is 0 msec
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