[nsp] EIGRP flapping

From: Florin Florian (florin@Cluj.RoEdu.Net)
Date: Thu Apr 11 2002 - 06:38:43 EDT


Hi ,

My router communicate with another router over serial link, with EIGRP.
The problem consist in EIGRP flapping and my backbone interface is up and
down, frecvently...

Apr 7 12:25:13 router 272: 01:07:26: %LINEPROTO-5-UPDOWN: Line protocol
on Interface Serial0/1/0, changed state to down
Apr 7 12:25:14 router 273: 01:07:27: %LINK-3-UPDOWN: Interface
Serial0/1/0, changed state to up
Apr 7 12:25:14 router 274: 01:07:28: %LINEPROTO-5-UPDOWN: Line protocol
on Interface Serial0/1/0, changed state to up
Apr 7 12:26:02 router 275: 01:08:15: %DUAL-5-NBRCHANGE: IP-EIGRP my AS:
Neighbor x.x.x.x (Serial0/1/0) is down: peer restarted
Apr 7 12:26:02 router 276: 01:08:15: %DUAL-5-NBRCHANGE: IP-EIGRP my AS:
Neighbor x.x.x.x (Serial0/1/0) is up: new adjacency
Apr 7 12:26:13 router 277: 01:08:26: %LINEPROTO-5-UPDOWN: Line protocol
on Interface Serial0/1/0, changed state to down
Apr 7 12:26:14 router 278: 01:08:27: %LINK-3-UPDOWN: Interface
Serial0/1/0, changed state to up
Apr 7 12:26:14 router 279: 01:08:28: %LINEPROTO-5-UPDOWN: Line protocol
on Interface Serial0/1/0, changed state to up
Apr 7 12:31:02 router 282: 01:13:15: %DUAL-5-NBRCHANGE: IP-EIGRP my AS:
Neighbor x.x.x.x (Serial0/1/0) is down: peer restarted
Apr 7 12:31:04 router 283: 01:13:16: %DUAL-5-NBRCHANGE: IP-EIGRP my AS:
Neighbor x.x.x.x (Serial0/1/0) is up: new adjacency
Apr 7 12:31:13 router 284: 01:13:26: %LINEPROTO-5-UPDOWN: Line protocol
on Interface Serial0/1/0, changed state to down

Last week I introduced a new VIP 4-80 controller in the router CISCO
7513(module 0) :
1 VIP4-80 RM7000 controller (1 FastEthernet)(4 Serial)(2 E1).
 Controller Memory Size: 128 MBytes DRAM, 65536 KBytes SRAM
                Fast-Ethernet PA, 1 ports, 100BaseTX-ISL
                Fast-Serial PA, 4 ports (attention:PA 4T not PA 4T+)

This controllers not function properly with System Bootstrap, Version
11.1(8)CA1, and I proceed to install another bootstrap.
Now I have a new bootloader version 12.2(1) and with work much better.

IOS (tm) RSP Software (RSP-JK9SV-M), Version 12.2(3), RELEASE SOFTWARE
(fc1)
ROM: System Bootstrap, Version 11.1(8)CA1, EARLY DEPLOYMENT RELEASE
SOFTWARE

BOOTLDR: RSP Software (RSP-BOOT-M), Version 12.2(1), RELEASE SOFTWARE
(fc2)

I forget mention it, the backbone line is very full(bandwidth 6M) every
day and night, and mrtg graph don't have Gauss inflection.

router eigrp AS
 variance 4
 redistribute connected route-map match-xxx
 redistribute static route-map match-xxx
 passive-interface FastEthernet5/0/0
 network x.x.x.x
 maximum-paths 6
 default-metric 10000 100 255 1 1500
 no auto-summary
 eigrp log-neighbor-changes

router bgp AS
 no synchronization
 no bgp fast-external-fallover
 bgp log-neighbor-changes
 bgp deterministic-med
 aggregate-address x.x.x.x
................
 redistribute connected route-map match-xxx
 redistribute static route-map match-xxx
 redistribute eigrp AS
 neighbor AS ....
............

Why not function properly the backbone links with VIP 4-80 with the PA
4T and the PA - 1FE ISL???
This PA 4T function with VIP 2-40

Thanks in advance.
fflorin



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