EIGRP "offset-lis"t vs. "distance" command

From: Michael Zuo (mzuo@ixiacom.com)
Date: Sat Nov 25 2006 - 21:49:17 ART


Hi all,

If SW2 connecting to R2 and R3 via EIGRP and I want to prefer the SW2-R2
link for some routes and SW2-R3 link for other routes, would
"offset-list" from EIGRP and "distance" be equivalent? I tried both and
both seem to work for internal EIGRP routes. However, "distance"
command does not seem to work for external EIGRP routes that are coming
in. is this expected? My configuration is (notice that external EIGRP
routes still have AD of 170 instead 89 as configured):

SW2(config-router)#do sh run | be router ei

router eigrp 10

 timers active-time 5

 network 0.0.0.0

 distance 89 156.1.58.5 0.0.0.0 ODD

 distance 89 156.1.18.1 0.0.0.0 EVEN

 no auto-summary

!

!

ip access-list standard EVEN

 permit 0.0.0.0 255.255.254.255

ip access-list standard ODD

 permit 0.0.1.0 255.255.254.255

!

!

SW2(config-router)#do sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static
route

       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D EX 222.22.2.0/24 [170/25602816] via 156.1.58.5, 00:00:03, Vlan58

D 204.12.1.0/24 [89/281856] via 156.1.58.5, 00:01:10, Vlan58

D EX 220.20.3.0/24 [170/25602816] via 156.1.58.5, 00:00:03, Vlan58

D 200.0.0.0/24 [89/5398272] via 156.1.18.1, 00:01:11, Vlan18

     54.0.0.0/24 is subnetted, 1 subnets

D 54.1.1.0 [89/5270272] via 156.1.58.5, 00:01:11, Vlan58

D 200.0.1.0/24 [89/5398272] via 156.1.58.5, 00:01:11, Vlan58

     156.1.0.0/24 is subnetted, 12 subnets

D 156.1.27.0 [89/4755712] via 156.1.58.5, 00:01:12, Vlan58

D 156.1.23.0 [89/4730112] via 156.1.58.5, 00:01:12, Vlan58

C 156.1.18.0 is directly connected, Vlan18

D 156.1.13.0 [89/5145856] via 156.1.58.5, 00:01:12, Vlan58

C 156.1.8.0 is directly connected, Vlan8

D EX 156.1.4.0 [170/25602816] via 156.1.58.5, 00:01:12, Vlan58

D 156.1.3.0 [89/2588416] via 156.1.58.5, 00:01:13, Vlan58

C 156.1.58.0 is directly connected, Vlan58

D 156.1.45.0 [89/2170112] via 156.1.58.5, 00:01:12, Vlan58

D EX 156.1.44.0 [170/25602816] via 156.1.58.5, 00:01:12, Vlan58

D 156.1.35.0 [89/2585856] via 156.1.58.5, 00:01:12, Vlan58

D 156.1.67.0 [89/4758272] via 156.1.58.5, 00:01:13, Vlan58

D 200.0.2.0/24 [89/5398272] via 156.1.18.1, 00:01:13, Vlan18

D 200.0.3.0/24 [89/5398272] via 156.1.58.5, 00:01:14, Vlan58

D 192.10.1.0/24 [89/281856] via 156.1.58.5, 00:01:12, Vlan58

     150.1.0.0/24 is subnetted, 8 subnets

D 150.1.7.0 [89/4883712] via 156.1.58.5, 00:01:14, Vlan58

D 150.1.6.0 [89/4886272] via 156.1.18.1, 00:01:14, Vlan18

D 150.1.5.0 [89/130816] via 156.1.58.5, 00:01:12, Vlan58

D EX 150.1.4.0 [170/25602816] via 156.1.58.5, 00:01:12, Vlan58

D 150.1.3.0 [89/2713856] via 156.1.58.5, 00:01:14, Vlan58

D 150.1.2.0 [89/4858112] via 156.1.18.1, 00:01:14, Vlan18

D 150.1.1.0 [89/5273856] via 156.1.58.5, 00:01:14, Vlan58

C 150.1.8.0 is directly connected, Loopback0

SW2(config-router)#

Thank you in advance



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