Hey thanks Narendra for a very thorough test!
From: Narendra Naukwal [mailto:[email protected]] Sent: 07 April 2013 11:08 To: Ray Courtney; [email protected]; [email protected] Subject: Re: [OSL | CCIE_RS] Changing the distance of EIGRP routes Ray, I further tested following to confirm: Topology: R1--R2 (2.2.2.2/32 & 100.100.100.100/32) | R3 (3.3.3.3/32) On R2 there are two loopback interfaces, 2.2.2.2/32 is redistributed into EIGRP whereas network command is used for 100.100.100.100/32 subnet interface. Now I have tried modifying distance on R1. Take a look at following: 1. RIB on R1 with no modification to EIGRP. R1(config-router)#do sh ip route ei 2.0.0.0/32 is subnetted, 1 subnets D EX 2.2.2.2 [170/409600] via 12.0.0.2, 00:00:01, FastEthernet0/0 100.0.0.0/32 is subnetted, 1 subnets D 100.100.100.100 [90/409600] via 12.0.0.2, 00:00:01, FastEthernet0/0 3.0.0.0/32 is subnetted, 1 subnets D EX 3.3.3.3 [170/409600] via 13.0.0.3, 00:00:02, FastEthernet0/1 2. Looking at various distance options available: R1(config-router)#distance ? <1-255> Administrative distance eigrp IP-EIGRP distance 3. Using distance X command (to modify distance of all routes learnt via R2 to 95). R1(config-router)#distance 95 12.0.0.2 0.0.0.0 R1#sh ip route eigrp 2.0.0.0/32 is subnetted, 1 subnets D EX 2.2.2.2 [170/409600] via 12.0.0.2, 00:00:04, FastEthernet0/0 << Still 170 100.0.0.0/32 is subnetted, 1 subnets D 100.100.100.100 [95/409600] via 12.0.0.2, 00:00:04, FastEthernet0/0 << 3.0.0.0/32 is subnetted, 1 subnets D EX 3.3.3.3 [170/409600] via 13.0.0.3, 00:00:04, FastEthernet0/1 As can be seen 'distance X' command does not have any affect on External route (2.2.2.2/32 prefix) learnt via source 12.0.0.2, however,as expected distance of Internal route changed to 95. 4. Using eigrp distance command does the trick, however, changes the distance of all the EIGRP extenal routes in the RIB (from all the neighbors). R1(config-router)#distance eigrp 90 95 R1#sh ip route eigrp 2.0.0.0/32 is subnetted, 1 subnets D EX 2.2.2.2 [95/409600] via 12.0.0.2, 00:00:02, FastEthernet0/0 << Changed to 95 100.0.0.0/32 is subnetted, 1 subnets D 100.100.100.100 [90/409600] via 12.0.0.2, 00:00:02, FastEthernet0/0 3.0.0.0/32 is subnetted, 1 subnets D EX 3.3.3.3 [95/409600] via 13.0.0.3, 00:00:03, FastEthernet0/1 << Changed to 95 So indeed, from what it seems it is not possible to change AD of selected EIGRP external routes. Hope this helps!! From: Ray Courtney <[email protected]> To: Narendra Naukwal <[email protected]>; [email protected] Sent: Sunday, 7 April 2013 2:46 PM Subject: RE: [OSL | CCIE_RS] Changing the distance of EIGRP routes So you can selectively change the AD for Internal EIGRP routes, but not selectively change External routes? From: Narendra Naukwal [mailto:[email protected]] Sent: 07 April 2013 09:42 To: Ray Courtney; [email protected] Subject: Re: [OSL | CCIE_RS] Changing the distance of EIGRP routes Ray, This seems like an IOS feature, one is NOT allowed to change the distance for a subset of external eigrp routes. Using 'distance EIGRP' command will work, but will modify the distance of all EIGRP external routes in RIB. Regards, Naren From: Ray Courtney <[email protected]> To: [email protected] Sent: Sunday, 7 April 2013 1:28 PM Subject: [OSL | CCIE_RS] Changing the distance of EIGRP routes Hi Everyone, I have come across this problem (Vol 2 Lab 8): The requirement is to have certain routes showing up as AD 95. router eigrp 1 Distance 95 172.30.200.7 0.0.0.0 90 access-list 90 permit 10.7.1.0 access-list 90 permit 10.7.2.0 These were External routes at the time and this command did not work. The only way to change the AD was to change the AD for all External routes using: distance eigrp 90 95 Is this a "feature" of the IOS version. Ray Courtney _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit http://www.ipexpert.com/ Are you a CCNP or CCIE and looking for a job? Check out http://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
