Command Default The hello interval for low-speed, nonbroadcast multiaccess (NBMA) networks is 60 seconds and 5 seconds for all other networks. Command Default The EIGRP hold time is 180 seconds for low-speed, nonbroadcast multiaccess (NBMA) networks and 15 seconds for all other networks.
http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_eigrp/command/ire-i1.html#wp3171463312 -- BR Tony Sent from my iPad On 6 Jul 2013, at 14:52, rayarago <[email protected]> wrote: > > There are a couple of concepts at play here: > > > > 1) Default values for EIGRP timers: hello and hold > 2) What happens when you have default values and you reload? > 3) The relationship between Hello and Hold in EIGRP > 4) Neighbors and EIGRP how is it different from OSPF? > > > Answers/tips: > > 1) the default values have a loose relationship but they are technically > independent, setting the Hello Timer does not automatically change the Hold > timer (as in OSPF). > 2) This is what you are seeing, it is not gremlins or bugs: this is what the > router is supposed to do. Sometimes default commands do not make it into the > config on reload it depends on what version of code and what features you are > using. In the end the point is that you shouldn't think it is a bug. > 3) review the documentation, VoDs etc. > 4) with EIGRP you tell your neighbor the schedule for your Hellos, and the > Hold time. IN OSPF > > > BTW, for T1 speeds and below EIGRP has one set of timers and for above it has > another. It doesn't have anything to do with NBMA, as far as I know. Look > it up Jim, and let us all know what you found. (please) > > The only NBMA rule that i can recall is that Split Horizon is disabled for > NBMA. > > Regards, > > Ray > > > > > On Jul 6, 2013, at 3:21 AM, Tony Singh <[email protected]> wrote: > >> >> >> 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 > _______________________________________________ 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
