From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Fri Oct 03 2003 - 00:44:15 GMT-3
This is normal behavior. Think of it like this: When you redistribute
EIGRP into OSPF you are also redistributing the connected interfaces
that are being advertised via EIGRP.
interface Loopback0
ip address 172.16.103.1 255.255.255.255
!
interface FastEthernet0/1
ip address 172.16.35.3 255.255.255.0
!
router eigrp 100
network 172.16.35.0 0.0.0.255
!
router ospf 1
redistribute connected subnets route-map DEFAULT <--
redistribute eigrp 100 subnets tag 100
network 172.16.123.0 0.0.0.255 area 0
!
route-map DEFAULT permit 10
match interface FastEthernet0/1
Of course this "redistribute connected subnets route-map DEFAULT" does
not show up in the configuration. The way you can tell it is there is
because once you actually add the "redistribute connected" command under
"router ospf" you lose this "default" redistribution of the connected
EIGRP interfaces.
When you configure redistribution for the loopback 0 interface you will
overwrite the "default" redistribution command that redistributed the
interface that were being advertised via EIGRP.
interface Loopback0
ip address 172.16.103.1 255.255.255.255
!
interface FastEthernet0/1
ip address 172.16.35.3 255.255.255.0
!
router eigrp 100
network 172.16.35.0 0.0.0.255
!
router ospf 1
redistribute connected subnets route-map LOOPBACK0
redistribute eigrp 100 subnets tag 100
network 172.16.123.0 0.0.0.255 area 0
!
route-map LOOPBACK0 permit 10
match interface Loopback0
So the solution is to add the interface advertised via EIGRP to the same
route-map that is allowing the loopback interface:
interface Loopback0
ip address 172.16.103.1 255.255.255.255
!
interface FastEthernet0/1
ip address 172.16.35.3 255.255.255.0
!
router eigrp 100
network 172.16.35.0 0.0.0.255
!
router ospf 1
redistribute connected subnets route-map LOOPBACK0
redistribute eigrp 100 subnets tag 100
network 172.16.123.0 0.0.0.255 area 0
!
route-map LOOPBACK0 permit 10
match interface Loopback0
match interface FastEthernet0/1 <--- Needed
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Troy
Sent: Thursday, October 02, 2003 8:22 PM
To: ccielab@groupstudy.com
Subject: Redist. Eigrp into OSPF with route map blocking connected
interface
I am confused as to why a route map designed to block all connected
interfaces except the lo 0
would prevent a network specified under the EIGRP process from being
redistributed into OSPF
I am missing something fundamental. I would think that since fa 0/1 it
is a part of the EIGRP
process then it would be redistributed into OSPF even though a route map
may block the connected
interface. Is this incorrect?
This config works:
interface Loopback0
ip address 172.16.103.1 255.255.255.255
interface FastEthernet0/1
ip address 172.16.35.3 255.255.255.0
duplex auto
speed auto
router eigrp 100
network 172.16.35.0 0.0.0.255
no auto-summary
!
router ospf 1
log-adjacency-changes
redistribute eigrp 100 subnets tag 100
network 172.16.123.0 0.0.0.255 area 0
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
172.16.20.0 172.16.102.1 1455 0x80000010 0x007AA9 120
172.16.35.0 172.16.103.1 20 0x80000001 0x0082B4 100
172.16.105.0 172.16.103.1 1617 0x80000001 0x0080EF 100
172.16.120.0 172.16.102.1 1456 0x80000010 0x002A95 120
The 172.16.35.0 is redistributed correctly
However why is the same network blocked with this config?
this config fails to redistribute lo 0:
interface Loopback0
ip address 172.16.103.1 255.255.255.255
interface FastEthernet0/1
ip address 172.16.35.3 255.255.255.0
duplex auto
speed auto
router eigrp 100
network 172.16.35.0 0.0.0.255
no auto-summary
!
router ospf 1
log-adjacency-changes
redistribute connected subnets route-map advertiselo0
redistribute eigrp 100 subnets tag 100
network 172.16.123.0 0.0.0.255 area 0
!
access-list 1 permit 172.16.103.1
route-map advertiselo0 permit 10
match ip address 1
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
172.16.20.0 172.16.102.1 1670 0x80000010 0x007AA9 120
172.16.103.1 172.16.103.1 33 0x80000001 0x007ADB 0
172.16.105.0 172.16.103.1 1832 0x80000001 0x0080EF 100
172.16.120.0 172.16.102.1 1671 0x80000010 0x002A95 120
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This archive was generated by hypermail 2.1.4 : Mon Nov 24 2003 - 07:52:56 GMT-3