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High RTO with low SSRT values on EIGRP

spfister336
Level 2
Level 2

‎04-11-2023 11:14 AM

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?

Labels:
82 Replies 82

spfister336
Level 2
Level 2

‎04-12-2023 07:39 AM

I'm not sure that the issue is occurring right now, but I've just done the ping test again, and on each repeat, not all of the neighbors responded. Is this a site that rate limiting of multicast is taking place?

MHM Cisco World
VIP
VIP
In response to spfister336

‎04-12-2023 07:42 AM

that why I ask you do ping with repeat 100 not 5. 
friend it better to config eigrp neighbor. 

0 Helpful

spfister336
Level 2
Level 2

‎04-12-2023 07:43 AM

Yes, I think I'll push for that change here. Thank you!

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 06:14 AM

I've tried static neighbor statements on a dozen of the remote sites and some are still occasionally flapping. I added:

neighbor <neighbor address> <physical interface to neighbor>

to the EIGRP stanza on both sides. Instead of the physical interface, should I have used the VLAN interface?

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 07:11 AM

I'll do a separate post on the static neighbors issue

0 Helpful

MHM Cisco World
VIP
VIP

‎04-13-2023 07:54 AM

Oh that not ok

Can you share 

Show ip eigrp neighbor 

Wait 5 min

Show ip eigrp neighbor 

I need to see count in both time 

Thanks 

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 08:11 AM

Certainly... output is below. I didn't reset the EIGRP session in any way after putting in the neighbor statement. Also, if some sites are using static neighbors and some are not (yet), will that eventually cause an issue until all sites use static neighbors?

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
23 10.210.80.2 Vl280 14 00:01:42 1 100 0 342
13 10.210.21.2 Vl221 12 00:13:49 4 100 0 866
11 10.210.56.2 Vl256 12 00:17:16 2 100 0 45867
10 10.210.22.2 Vl322 11 00:17:38 1 100 0 2386
5 10.210.71.2 Vl271 10 00:17:56 2 100 0 2309
7 10.210.48.2 Vl248 14 00:21:19 1 100 0 645
24 10.210.74.2 Vl274 14 00:23:19 4 100 0 4761
27 10.210.31.2 Vl231 14 00:24:13 1 100 0 1995
0 10.210.47.2 Vl247 13 00:26:58 1 100 0 55558
28 10.210.45.2 Vl245 13 00:27:38 2 100 0 3153
20 10.210.75.2 Vl275 13 00:29:13 1 100 0 1412
19 10.210.77.2 Vl277 11 00:34:45 2 100 0 1077
26 10.210.13.2 Vl213 11 00:40:53 1 100 0 11666
14 10.210.66.2 Vl266 13 00:42:10 1 100 0 669
18 10.210.79.2 Vl279 12 00:43:45 1 100 0 329
30 10.210.44.2 Vl244 12 00:56:35 2 100 0 1195
25 10.210.36.2 Vl236 12 00:57:34 1 100 0 21564
29 10.210.55.2 Vl255 12 01:05:42 1 100 0 1316
8 10.210.14.2 Vl214 14 01:10:24 1 100 0 1299
31 10.210.12.2 Vl212 11 01:14:32 1 100 0 33301
15 10.210.27.2 Vl227 14 01:33:27 1 100 0 1310
9 10.210.37.2 Vl237 14 01:55:06 1 100 0 1363
6 10.210.81.2 Vl281 10 01:57:12 1 100 0 342
1 10.210.46.2 Vl246 12 01:58:06 3 100 0 2581
12 10.210.15.2 Vl215 13 02:02:25 1 100 0 647
16 10.210.17.2 Vl217 10 02:05:23 1 100 0 1324
17 10.210.76.2 Vl276 14 02:09:50 1 100 0 2195
22 10.210.41.2 Vl241 11 02:35:02 1 100 0 390
4 10.210.23.2 Vl223 13 02:58:03 1 100 0 3923
2 10.210.43.2 Vl243 13 20:28:46 1 100 0 340
21 10.210.61.2 Vl261 10 21:32:46 1 100 0 35270
3 10.210.25.2 Vl225 10 1d19h 1 100 0 45822
32 172.18.0.2 Twe1/0/5 14 4w5d 1 100 0 5041
38 10.99.89.98 Vl89 14 1y16w 1 100 0 321920
99-c95-clan1#
99-c95-clan1#
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
26 10.210.13.2 Vl213 13 00:01:16 3 100 0 11670
13 10.210.21.2 Vl221 12 00:03:13 3 100 0 869
23 10.210.80.2 Vl280 13 00:07:00 1 100 0 342
11 10.210.56.2 Vl256 12 00:22:34 1 150 0 45867
10 10.210.22.2 Vl322 13 00:22:56 1 150 0 2388
5 10.210.71.2 Vl271 13 00:23:14 2 150 0 2309
7 10.210.48.2 Vl248 12 00:26:37 1 150 0 645
24 10.210.74.2 Vl274 10 00:28:37 2 150 0 4763
27 10.210.31.2 Vl231 11 00:29:31 1 150 0 1997
0 10.210.47.2 Vl247 13 00:32:16 1 150 0 55560
28 10.210.45.2 Vl245 11 00:32:57 2 150 0 3153
20 10.210.75.2 Vl275 11 00:34:32 1 100 0 1412
19 10.210.77.2 Vl277 12 00:40:03 1 100 0 1077
14 10.210.66.2 Vl266 11 00:47:28 1 100 0 669
18 10.210.79.2 Vl279 13 00:49:03 1 100 0 329
30 10.210.44.2 Vl244 13 01:01:54 1 150 0 1197
25 10.210.36.2 Vl236 12 01:02:52 1 225 0 21564
29 10.210.55.2 Vl255 13 01:11:00 2 150 0 1316
8 10.210.14.2 Vl214 13 01:15:42 1 100 0 1299
31 10.210.12.2 Vl212 11 01:19:50 1 150 0 33303
15 10.210.27.2 Vl227 13 01:38:45 1 100 0 1310
9 10.210.37.2 Vl237 12 02:00:24 1 150 0 1363
6 10.210.81.2 Vl281 12 02:02:30 1 150 0 342
1 10.210.46.2 Vl246 13 02:03:24 1 150 0 2583
12 10.210.15.2 Vl215 11 02:07:43 1 150 0 647
16 10.210.17.2 Vl217 13 02:10:41 2 150 0 1324
17 10.210.76.2 Vl276 10 02:15:08 1 150 0 2197
22 10.210.41.2 Vl241 10 02:40:20 1 150 0 390
4 10.210.23.2 Vl223 14 03:03:21 1 150 0 3923
2 10.210.43.2 Vl243 10 20:34:05 1 150 0 340
21 10.210.61.2 Vl261 11 21:38:04 1 150 0 35270
3 10.210.25.2 Vl225 10 1d19h 1 150 0 45822
32 172.18.0.2 Twe1/0/5 14 4w5d 1 100 0 5045
38 10.99.89.98 Vl89 13 1y16w 1 100 0 321924

 

0 Helpful

MHM Cisco World
VIP
VIP
In response to spfister336

‎04-13-2023 08:29 AM

one more show ip eigrp neighbor 
thanks 

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 08:39 AM

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
31 10.210.12.2 Vl212 12 00:01:57 1 100 0 33312
2 10.210.43.2 Vl243 14 00:08:39 1 100 0 343
23 10.210.80.2 Vl280 12 00:13:15 1 150 0 348
20 10.210.75.2 Vl275 13 00:25:39 2 150 0 1415
26 10.210.13.2 Vl213 10 00:33:02 1 100 0 11670
13 10.210.21.2 Vl221 14 00:34:59 1 150 0 869
11 10.210.56.2 Vl256 11 00:54:20 1 100 0 45867
10 10.210.22.2 Vl322 14 00:54:42 1 100 0 2394
5 10.210.71.2 Vl271 11 00:55:00 1 100 0 2309
7 10.210.48.2 Vl248 13 00:58:24 1 100 0 645
24 10.210.74.2 Vl274 12 01:00:24 1 337 0 4769
27 10.210.31.2 Vl231 11 01:01:17 1 337 0 2003
0 10.210.47.2 Vl247 14 01:04:02 1 337 0 55566
28 10.210.45.2 Vl245 12 01:04:43 1 100 0 3153
19 10.210.77.2 Vl277 12 01:11:49 1 225 0 1077
14 10.210.66.2 Vl266 13 01:19:15 1 225 0 669
18 10.210.79.2 Vl279 11 01:20:49 1 150 0 329
30 10.210.44.2 Vl244 12 01:33:40 1 337 0 1203
25 10.210.36.2 Vl236 14 01:34:38 1 337 0 21564
29 10.210.55.2 Vl255 13 01:42:47 1 100 0 1316
8 10.210.14.2 Vl214 13 01:47:29 1 150 0 1299
15 10.210.27.2 Vl227 13 02:10:31 1 100 0 1310
9 10.210.37.2 Vl237 12 02:32:10 1 100 0 1363
6 10.210.81.2 Vl281 14 02:34:16 1 100 0 342
1 10.210.46.2 Vl246 10 02:35:10 1 337 0 2589
12 10.210.15.2 Vl215 12 02:39:29 1 100 0 647
16 10.210.17.2 Vl217 13 02:42:27 1 100 0 1324
17 10.210.76.2 Vl276 11 02:46:55 1 337 0 2203
22 10.210.41.2 Vl241 12 03:12:07 1 100 0 390
4 10.210.23.2 Vl223 14 03:35:07 1 100 0 3923
21 10.210.61.2 Vl261 13 22:09:50 2 100 0 35270
3 10.210.25.2 Vl225 10 1d19h 1 100 0 45822
32 172.18.0.2 Twe1/0/5 13 4w5d 1 100 0 5057
38 10.99.89.98 Vl89 12 1y16w 1 100 0 321936

0 Helpful

MHM Cisco World
VIP
VIP
In response to spfister336

‎04-13-2023 08:45 AM

show ip eigrp traffic <<- share this please 

0 Helpful

MHM Cisco World
VIP
VIP
In response to MHM Cisco World

‎04-13-2023 08:55 AM

2 10.210.43.2 Vl243 13 20:28:46 1 100 0 340 <- one 
2 10.210.43.2 Vl243 10 20:34:05 1 150 0 340 <- two
2 10.210.43.2 Vl243 14 00:08:39 1 100 0 343 <- three

please share the 
show ip eigrp neighbor 10.210.43.2 detail 


 

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 09:02 AM

99-c95-clan1#show ip eigrp traffic
EIGRP-IPv4 Traffic Statistics for AS(1)
Hellos sent/received: 91659431/329033683
Updates sent/received: 1234343/302098
Queries sent/received: 111133/97511
Replies sent/received: 55724/162215
Acks sent/received: 406094/1929838
SIA-Queries sent/received: 0/0
SIA-Replies sent/received: 0/0
Hello Process ID: 591
PDM Process ID: 589
Socket Queue: 0/10000/1302/0 (current/max/highest/drops)
Input Queue: 0/10000/1302/0 (current/max/highest/drops)

99-c95-clan1#show ip eigrp neigh 10.210.43.2 detail
^
% Invalid input detected at '^' marker.

0 Helpful

MHM Cisco World
VIP
VIP
In response to spfister336

‎04-13-2023 09:08 AM

99-c95-clan1#show ip eigrp neigh  detail <<- without neighbor IP

0 Helpful

spfister336
Level 2
Level 2

‎04-13-2023 09:10 AM

99-c95-clan1#show ip eigrp neigh detail
EIGRP-IPv4 Neighbors for AS(1)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
31 10.210.12.2 Vl212 14 00:00:10 1 150 0 33325
Version 20.0/2.0, Retrans: 5, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

22 10.210.41.2 Vl241 13 00:03:53 2 225 0 393
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
24 10.210.74.2 Vl274 10 00:04:39 1 150 0 4778
Version 20.0/2.0, Retrans: 4, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

2 10.210.43.2 Vl243 10 00:39:15 1 100 0 343
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
23 10.210.80.2 Vl280 11 00:43:51 1 225 0 348
Version 25.0/2.0, Retrans: 11, 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 12 00:56:15 1 225 0 1415
Version 20.0/2.0, Retrans: 11, 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 13 01:03:38 1 100 0 11670
Version 20.0/2.0, Retrans: 11, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
13 10.210.21.2 Vl221 11 01:05:35 1 225 0 869
Version 20.0/2.0, Retrans: 9, Retries: 0, Prefixes: 5
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
11 10.210.56.2 Vl256 10 01:24:56 1 100 0 45867
Version 20.0/2.0, Retrans: 14, 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 14 01:25:18 1 150 0 2401
Version 20.0/2.0, Retrans: 16, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

5 10.210.71.2 Vl271 11 01:25:36 3 100 0 2309
Version 20.0/2.0, Retrans: 16, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
7 10.210.48.2 Vl248 12 01:28:59 1 100 0 645
Version 28.0/2.0, Retrans: 15, Retries: 0, Prefixes: 3
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
27 10.210.31.2 Vl231 14 01:31:53 1 150 0 2010
Version 20.0/2.0, Retrans: 26, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

0 10.210.47.2 Vl247 12 01:34:38 1 150 0 55573
Version 20.0/2.0, Retrans: 26, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

28 10.210.45.2 Vl245 13 01:35:19 1 100 0 3153
Version 20.0/2.0, Retrans: 25, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
19 10.210.77.2 Vl277 12 01:42:25 1 225 0 1077
Version 20.0/2.0, Retrans: 33, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
14 10.210.66.2 Vl266 13 01:49:50 1 225 0 669
Version 20.0/2.0, Retrans: 32, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
18 10.210.79.2 Vl279 14 01:51:25 1 225 0 329
Version 20.0/2.0, Retrans: 35, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
30 10.210.44.2 Vl244 12 02:04:16 1 150 0 1210
Version 20.0/2.0, Retrans: 39, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

25 10.210.36.2 Vl236 10 02:05:14 1 225 0 21564
Version 20.0/2.0, Retrans: 40, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
29 10.210.55.2 Vl255 12 02:13:22 1 225 0 1316
Version 20.0/2.0, Retrans: 41, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
8 10.210.14.2 Vl214 14 02:18:04 1 225 0 1299
Version 20.0/2.0, Retrans: 45, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
15 10.210.27.2 Vl227 13 02:41:07 1 100 0 1310
Version 20.0/2.0, Retrans: 46, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
9 10.210.37.2 Vl237 12 03:02:46 1 150 0 1363
Version 20.0/2.0, Retrans: 48, Retries: 0, Prefixes: 5
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
6 10.210.81.2 Vl281 13 03:04:52 1 100 0 342
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
1 10.210.46.2 Vl246 14 03:05:46 1 150 0 2596
Version 20.0/2.0, Retrans: 60, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

12 10.210.15.2 Vl215 13 03:10:05 1 150 0 647
Version 20.0/2.0, Retrans: 55, 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 14 03:13:03 1 150 0 1324
Version 20.0/2.0, Retrans: 55, 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 11 03:17:30 1 150 0 2210
Version 20.0/2.0, Retrans: 64, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

4 10.210.23.2 Vl223 13 04:05:43 1 100 0 3923
Version 28.0/2.0, Retrans: 62, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
21 10.210.61.2 Vl261 13 22:40:26 1 150 0 35270
Version 20.0/2.0, Retrans: 74, Retries: 0, Prefixes: 4
Topology-ids from peer - 0
Topologies advertised to peer: base

Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
3 10.210.25.2 Vl225 10 1d20h 1 100 0 45822
Version 20.0/2.0, Retrans: 157, 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 4w5d 1 100 0 5071
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 13 1y16w 1 100 0 321950
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

0 Helpful

MHM Cisco World
VIP
VIP
In response to spfister336

‎04-13-2023 09:31 AM

are you sure you config static neighbor for above EIGRP routers ?

Screenshot (601).png

0 Helpful
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