In this situation, the sequence of events is as follows: 1. The command “ip hello-interval eigrp 1001 20” is applied to the frame interfaces of R2, R5 and R6 2. All three routers are using a hold time of 180 seconds and the EIGRP neighbors are working fine 3. The configuration is saved on R5 and R5 reloads 4. When R5 comes back up, the interface configuration is changed with the new line appearing: “ip hold-time eigrp 1001 15” 5. R2 and R5 form an EIGRP neighbor relationship and R5 is still using a hold time of 180 seconds, but R2 is now using a hold time of 15 seconds for R5. The result is a continuously flapping neighbor 6. Manually setting R2’s interface with “ip hold-time eigrp 1001 180” does not change the hold time on R2, even after a save and reload 7. The issue is resolved by removing both the “hello-interval” and “hold-time” configuration from R5’s serial interface and then reapplying the “hello-interval” configuration on R5. 8. The issue repeats when R5 is reloaded. The exact same issue occurs between R6 and R2 if R6 is reloaded.
The goal is to get this to work consistently even if the configurations are saved and the routers reloaded. Much appreciated. jpn ------ Original Message ------ Received: 06:21 AM EDT, 07/06/2013 From: Tony Singh <[email protected]> To: Jim Newell <[email protected]>Cc: "<[email protected]>" <[email protected]> Subject: Re: [OSL | CCIE_RS] Wkb1, Lab 9, Task 9.9 Make your config more uniform ip hello-interval eigrp 1001 20 ip hold-time eigrp 1001 60 Need to change the hold time as the default over NBMA networks is 180 seconds On your R5 config you have > ip hold-time eigrp 1001 15 So when a hello comes in at 20 secs R5 resets the session as it has not received it within a 15 sec holdown -- BR Tony Sent from my iPad On 5 Jul 2013, at 22:38, "Jim Newell" <[email protected]> wrote: > This is in regard to Workbook 1, Lab 9, Task 9.9. I am not sure if anyone has > run into this issue before. > > The same command is applied to the frame-relay interfaces on R2, R5 and R6 to > set the EIGRP hello interval: > > ip hello-interval eigrp 1001 20 > > Afterward, all three routers are using a hold timer of 180 seconds for the > EIGRP neighbor on the frame cloud and the neighbors are fully up. > > R2#sh ip ei nei > IP-EIGRP neighbors for process 1001 > H Address Interface Hold Uptime SRTT RTO Q Seq > (sec) (ms) Cnt Num > 0 150.100.100.5 Se0/1/0.256 167 00:01:47 1251 5000 0 557 > > R5#sh ip ei nei > IP-EIGRP neighbors for process 1001 > H Address Interface Hold Uptime SRTT RTO Q Seq > (sec) (ms) Cnt Num > 0 150.100.100.2 Se0/1/0 166 00:02:08 103 2646 0 124 > > If I save the configuration on either R5 or R6 and reload the router, the > running configuration that appears on the serial interface changes. This > behavior is exactly the same on R5 and R6. > R5 before reload: > > interface Serial0/1/0 > bandwidth 64 > ip address 150.100.100.5 255.255.255.0 > ip bandwidth-percent eigrp 1001 43 > ip hello-interval eigrp 1001 20 > encapsulation frame-relay > clock rate 2000000 > frame-relay map ip 150.100.100.2 502 broadcast > frame-relay map ip 150.100.100.6 502 > no frame-relay inverse-arp > frame-relay lmi-type cisco > > R5 after reload: > > interface Serial0/1/0 > bandwidth 64 > ip address 150.100.100.5 255.255.255.0 > ip bandwidth-percent eigrp 1001 43 > ip hello-interval eigrp 1001 20 > ip hold-time eigrp 1001 15 > encapsulation frame-relay > clock rate 2000000 > frame-relay map ip 150.100.100.6 502 > frame-relay map ip 150.100.100.2 502 broadcast > no frame-relay inverse-arp > frame-relay lmi-type cisco > end > > A new line appears in the running config for the interface: “ip hold-time > eigrp 1001 15” > When R5 comes back up, R5 continues to use a hold timer of 180 seconds for R2, > but R2 begins using a hold timer of 15 seconds for R5. This mismatch results > in a continuously flapping neighbor adjacency. > Attempting to add the command “ip hold-time eigrp 1001 180” to the > serial0/1/0.256 interface on R2 does not have any effect and never shows in > the running configuration of the interface even after a reload. > > I am able to clear the issue by removing the “hello-interval” and > “hold-time” commands from the R5 (or R6) serial interface and then > reapplying the “ip hello-interval eigrp 1001 20” command. However, this > condition only lasts until the next reload. > > IOS versions for R2, R5 and R6 in this pod: > R2: c2800nm-adventerprisek9-mz.124-24.T2 > R5: c2800nm-adventerprisek9-mz.124-15.T9 > R6: c2801-adventerprisek9-mz.124-24.T2 > > I am just not sure is this is an isolated issue, or if there is something I am > missing > > Many thanks > Kind regards > jpn > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
