High RTO with low SSRT values on EIGRP - Page 4

spfister336 · ‎04-11-2023

We are running several remote sites connecting back to a central site using EIGRP as the routing protocol over AT&T's ASE on demand switched ethernet service. It's been mostly fine, but occasionally for 25 or 30 minutes we get a lot of flapping that seems to go away on its own. During this time, 'show ip eigrp neigh' shows lines like:

31 10.210.77.2 Vl277 13 00:00:40 1 5000 1 806
26 10.210.43.2 Vl243 13 00:00:40 1 100 0 124
20 10.210.15.2 Vl215 11 00:00:40 1 100 0 413
9 10.210.81.2 Vl281 13 00:00:40 2 1702 0 100
4 10.210.17.2 Vl217 14 00:00:40 1 5000 1 1072
29 10.210.66.2 Vl266 13 00:00:46 1 5000 1 462
25 10.210.71.2 Vl271 13 00:00:46 1 5000 1 2129
24 10.210.22.2 Vl322 14 00:00:46 17 771 1 1493

The SRTT values seem relatively OK, but the RTOs go into the thousands. Is it possible that this is packet loss, or multicast rate limiting on AT&T's part?

spfister336 · ‎04-14-2023

Now that traffic from remote sites is starting to pick up, it looks like its beginning the one site flapping at a time like yesterday.

MHM Cisco World · ‎04-14-2023

Wow happy news now'

So all site after static now stable except one.

Thansk a lot for update us.

Show ip eigrp neighbor

Check how many hours each site is UP.

It must now list one day or more.

Thanks again.

spfister336 · ‎04-14-2023

No, at least one of the static sites has flapped already, and I'm fairly confident the rest will too eventually today. Again, is it a problem that half are using static neighbor statements and half are not? All traffic to remote sites goes through a single interface.

99-c95-clan1#show ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
29 10.210.55.2 Vl255 13 00:00:26 3 100 0 1322
8 10.210.14.2 Vl214 11 00:03:53 4 150 0 1309
16 10.210.17.2 Vl217 11 00:13:24 3 150 0 1332
18 10.210.79.2 Vl279 14 18:01:04 2 100 0 333
9 10.210.37.2 Vl237 13 18:25:45 1 225 0 1366
19 10.210.77.2 Vl277 12 18:36:45 1 100 0 1081
1 10.210.46.2 Vl246 12 18:42:07 2 150 0 2649
4 10.210.23.2 Vl223 10 18:43:30 1 225 0 4034
2 10.210.43.2 Vl243 13 19:05:18 1 100 0 346
10 10.210.22.2 Vl322 14 19:15:36 2 150 0 2455
5 10.210.71.2 Vl271 13 19:28:08 1 100 0 2312
22 10.210.41.2 Vl241 13 19:29:23 2 100 0 401
15 10.210.27.2 Vl227 14 19:31:46 1 225 0 1313
26 10.210.13.2 Vl213 10 19:34:16 1 225 0 11677
25 10.210.36.2 Vl236 10 19:37:00 1 100 0 21567
17 10.210.76.2 Vl276 12 19:37:44 2 150 0 2262
13 10.210.21.2 Vl221 11 19:54:33 1 225 0 872
30 10.210.44.2 Vl244 12 20:02:53 2 150 0 1260
20 10.210.75.2 Vl275 10 20:05:38 1 225 0 1418
31 10.210.12.2 Vl212 14 20:42:04 2 150 0 33373
24 10.210.74.2 Vl274 13 20:46:33 2 150 0 4826
23 10.210.80.2 Vl280 12 21:25:44 1 225 0 348
11 10.210.56.2 Vl256 13 22:06:49 1 225 0 45867
7 10.210.48.2 Vl248 14 22:10:53 1 225 0 645
27 10.210.31.2 Vl231 13 22:13:47 2 150 0 2058
0 10.210.47.2 Vl247 14 22:16:31 2 150 0 55621
28 10.210.45.2 Vl245 12 22:17:12 1 225 0 3153
14 10.210.66.2 Vl266 14 22:31:44 1 225 0 669
6 10.210.81.2 Vl281 11 23:46:45 1 225 0 342
12 10.210.15.2 Vl215 12 23:51:58 1 225 0 647
21 10.210.61.2 Vl261 14 1d19h 1 225 0 35270
3 10.210.25.2 Vl225 13 2d16h 1 225 0 45822
32 172.18.0.2 Twe1/0/5 11 4w6d 1 100 0 5166
38 10.99.89.98 Vl89 14 1y16w 1 100 0 322045

MHM Cisco World · ‎04-14-2023

29 10.210.55.2 Vl255 13 00:00:26 3 100 0 1322
8 10.210.14.2 Vl214 11 00:03:53 4 150 0 1309
16 10.210.17.2 Vl217 11 00:13:24 3 150 0 1332

All other site have 20 hrs that good(with and without static neighbor)' the only above have short up time'

So are these config as static??

spfister336 · ‎04-14-2023

Here is the updated output:

99-c95-clan1#show ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
14 10.210.77.2 Vl277 12 00:04:35 9 150 0 1096
29 10.210.74.2 Vl274 12 00:17:31 1 150 0 4865
28 10.210.55.2 Vl255 10 00:17:31 1 150 0 1328
24 10.210.21.2 Vl221 10 00:17:31 4 150 0 875
18 10.210.79.2 Vl279 11 00:17:31 1 100 0 337
15 10.210.14.2 Vl214 14 00:17:31 215 1290 0 1315
13 10.210.23.2 Vl223 11 00:17:31 1 100 0 4093
10 10.210.22.2 Vl322 11 00:17:31 1 150 0 2500
8 10.210.27.2 Vl227 13 00:17:32 1 150 0 1329
7 10.210.37.2 Vl237 14 00:17:32 1 150 0 1373
4 10.210.45.2 Vl245 12 00:17:32 4 150 0 3269
20 10.210.75.2 Vl275 13 00:17:46 1 150 0 1424
1 10.210.46.2 Vl246 10 00:26:36 1 100 0 2690
21 10.210.61.2 Vl261 10 00:28:35 1 150 0 35276
16 10.210.17.2 Vl217 13 00:45:36 1 150 0 1339
26 10.210.13.2 Vl213 11 00:51:44 3 150 0 11680
0 10.210.47.2 Vl247 11 01:01:41 1 150 0 55661
22 10.210.41.2 Vl241 14 01:04:49 1 150 0 405
9 10.210.66.2 Vl266 13 01:07:24 1 150 0 678
6 10.210.81.2 Vl281 12 01:22:41 1 100 0 348
19 10.210.48.2 Vl248 14 01:28:54 1 100 0 648
11 10.210.56.2 Vl256 11 01:51:09 1 150 0 45870
12 10.210.15.2 Vl215 13 02:06:38 1 150 0 651
23 10.210.80.2 Vl280 14 02:08:00 1 150 0 351
2 10.210.43.2 Vl243 13 21:13:41 1 150 0 346
5 10.210.71.2 Vl271 13 21:36:31 2 150 0 2312
25 10.210.36.2 Vl236 12 21:45:22 1 150 0 21567
17 10.210.76.2 Vl276 12 21:46:07 1 100 0 2300
30 10.210.44.2 Vl244 10 22:11:16 1 100 0 1298
31 10.210.12.2 Vl212 11 22:50:26 1 150 0 33411
27 10.210.31.2 Vl231 11 1d00h 1 150 0 2096
3 10.210.25.2 Vl225 11 2d19h 1 150 0 45822
32 172.18.0.2 Twe1/0/5 10 4w6d 1 100 0 5255
38 10.99.89.98 Vl89 12 1y16w 1 100 0 322133

MHM Cisco World · ‎04-14-2023

Show ip eigrp neighbor detail<<- IF YOU can

spfister336 · ‎04-14-2023

Sure...

99-c95-clan1# show ip eigrp neigh det
EIGRP-IPv4 Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
29 10.210.74.2 Vl274 12 00:13:23 1 100 0 4868
Version 20.0/2.0, Retrans: 1, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

14 10.210.77.2 Vl277 12 00:29:05 6 100 0 1096
Version 20.0/2.0, Retrans: 6, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
28 10.210.55.2 Vl255 12 00:42:02 1 100 0 1328
Version 20.0/2.0, Retrans: 5, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
24 10.210.21.2 Vl221 11 00:42:02 3 100 0 875
Version 20.0/2.0, Retrans: 5, Retries: 0, Prefixes: 5
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
18 10.210.79.2 Vl279 13 00:42:02 1 100 0 337
Version 20.0/2.0, Retrans: 4, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
15 10.210.14.2 Vl214 12 00:42:02 138 828 0 1315
Version 20.0/2.0, Retrans: 6, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
13 10.210.23.2 Vl223 14 00:42:02 1 100 0 4093
Version 28.0/2.0, Retrans: 4, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
10 10.210.22.2 Vl322 13 00:42:02 1 100 0 2501
Version 20.0/2.0, Retrans: 6, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

8 10.210.27.2 Vl227 11 00:42:02 1 100 0 1329
Version 20.0/2.0, Retrans: 4, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
7 10.210.37.2 Vl237 13 00:42:02 1 100 0 1373
Version 20.0/2.0, Retrans: 5, Retries: 0, Prefixes: 5
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
4 10.210.45.2 Vl245 12 00:42:02 3 100 0 3269
Version 20.0/2.0, Retrans: 5, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
20 10.210.75.2 Vl275 14 00:42:17 1 100 0 1424
Version 20.0/2.0, Retrans: 7, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
1 10.210.46.2 Vl246 12 00:51:07 1 100 0 2691
Version 20.0/2.0, Retrans: 9, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

21 10.210.61.2 Vl261 10 00:53:05 1 100 0 35276
Version 20.0/2.0, Retrans: 10, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
16 10.210.17.2 Vl217 12 01:10:07 1 100 0 1339
Version 20.0/2.0, Retrans: 9, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
26 10.210.13.2 Vl213 14 01:16:15 3 100 0 11680
Version 20.0/2.0, Retrans: 12, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
0 10.210.47.2 Vl247 14 01:26:12 1 100 0 55662
Version 20.0/2.0, Retrans: 14, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

22 10.210.41.2 Vl241 11 01:29:20 1 100 0 405
Version 20.0/2.0, Retrans: 12, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
9 10.210.66.2 Vl266 10 01:31:54 1 100 0 678
Version 20.0/2.0, Retrans: 18, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
6 10.210.81.2 Vl281 12 01:47:12 3 100 0 348
Version 20.0/2.0, Retrans: 17, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
19 10.210.48.2 Vl248 12 01:53:25 1 100 0 648
Version 28.0/2.0, Retrans: 30, Retries: 0, Prefixes: 3
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
11 10.210.56.2 Vl256 11 02:15:40 1 100 0 45870
Version 20.0/2.0, Retrans: 31, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
12 10.210.15.2 Vl215 12 02:31:08 1 100 0 651
Version 20.0/2.0, Retrans: 36, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
23 10.210.80.2 Vl280 10 02:32:31 1 100 0 351
Version 25.0/2.0, Retrans: 43, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
2 10.210.43.2 Vl243 11 21:38:11 1 100 0 346
Version 20.0/2.0, Retrans: 50, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
5 10.210.71.2 Vl271 13 22:01:02 1 100 0 2312
Version 20.0/2.0, Retrans: 51, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
25 10.210.36.2 Vl236 14 22:09:53 3 100 0 21567
Version 20.0/2.0, Retrans: 59, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
17 10.210.76.2 Vl276 13 22:10:37 1 100 0 2301
Version 20.0/2.0, Retrans: 56, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

30 10.210.44.2 Vl244 13 22:35:47 1 100 0 1299
Version 20.0/2.0, Retrans: 68, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

31 10.210.12.2 Vl212 13 23:14:57 1 100 0 33412
Version 20.0/2.0, Retrans: 78, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

27 10.210.31.2 Vl231 13 1d00h 1 100 0 2097
Version 20.0/2.0, Retrans: 101, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

3 10.210.25.2 Vl225 13 2d19h 1 100 0 45822
Version 20.0/2.0, Retrans: 230, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
32 172.18.0.2 Twe1/0/5 11 4w6d 1 100 0 5258
Version 9.14/3.0, Retrans: 1, Retries: 0, Prefixes: 6
Topology-ids from peer - 0
Topologies advertised to peer: base

38 10.99.89.98 Vl89 14 1y16w 1 100 0 322136
Version 25.0/2.0, Retrans: 1, Retries: 0, Prefixes: 7
Topology-ids from peer - 0
Topologies advertised to peer: base

Max Nbrs: 0, Current Nbrs: 0
99-c95-clan1#

MHM Cisco World · ‎04-14-2023

Hi Freind,
can you adjust the hello time and hold time to be 10 30
do this only under one SVI interface.
check the stable of EIGRP neighbor

spfister336 · ‎04-14-2023

Yes, I can try that.... on what interface should I make that change?

MHM Cisco World · ‎04-14-2023

Select any vlan connect to neighbor flapping.

spfister336 · ‎04-17-2023

I will try and make this change today. I need to set that on both sides, correct?

MHM Cisco World · ‎04-17-2023

that Correct the time must match in both side

spfister336 · ‎04-17-2023

Could there be some disruption to the site while the change is being made?

MHM Cisco World · ‎04-17-2023

you meaning if you change the timer in one VLAN other will be effect ?

spfister336 · ‎04-17-2023

No, I meant if I change one side, will the connection be OK until the other side gets changed? I need to know if there will be any downtime at all, so I can schedule a maintenance window.