From: William Chen (kwchen@netvigator.com)
Date: Sat Dec 13 2003 - 03:48:37 GMT-3
Dear all,
I am not understand why the BGP conditional advertised default
route is going to be like that in this router.
! Here is the BGP setting and the route-map
router bgp 700
bgp log-neighbor-changes
network 7.7.7.0 mask 255.255.255.0
neighbor 172.16.34.3 remote-as 100
neighbor 172.16.34.3 default-originate route-map existLo
neighbor 172.16.34.4 remote-as 100
neighbor 172.16.34.4 default-originate route-map existLo
!
!
access-list 7 permit 172.16.107.0
!
route-map existLo permit 10
match ip address 7
!
! Here is the routing table
Codes: C - connected, S - static, I - IGRP, 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, 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
172.16.0.0/24 is subnetted, 16 subnets
i L1 172.16.61.0 [115/40] via 172.16.34.4, Ethernet1/0
i L1 172.16.51.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.36.0 [115/40] via 172.16.34.4, Ethernet1/0
C 172.16.34.0 is directly connected, Ethernet1/0
i L1 172.16.25.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.10.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.11.0 [115/30] via 172.16.34.4, Ethernet1/0
i L1 172.16.120.0 [115/30] via 172.16.34.4, Ethernet1/0
i L1 172.16.110.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.104.0 [115/10] via 172.16.34.4, Ethernet1/0
i L1 172.16.105.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.106.0 [115/40] via 172.16.34.4, Ethernet1/0
C 172.16.107.0 is directly connected, Loopback107
i L1 172.16.101.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.102.0 [115/20] via 172.16.34.4, Ethernet1/0
i L1 172.16.103.0 [115/40] via 172.16.34.4, Ethernet1/0
7.0.0.0/24 is subnetted, 1 subnets
C 7.7.7.0 is directly connected, Loopback71
! BGP default route is not advertised
FRS#sh ip bgp nei | in def
Default information originate, default route-map existLo, default not sent
Default information originate, default route-map existLo, default not sent
! Then I change the access-list 7, and the default route is advertised
FRS#conf t
Enter configuration commands, one per line. End with CNTL/Z.
FRS(config)#no access-list 7
FRS(config)#access-list 7 permit 172.16.107.0 0.0.0.255
FRS(config)#end
FRS#sh ip bgp nei | in def
Default information originate, default route-map existLo, default sent
Default information originate, default route-map existLo, default sent
FRS#
Any idea? Here is the "sh ver" output of the router:
FRS#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3620-JK8O3S-M), Version 12.2(4)T6, RELEASE SOFTWARE
(fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 30-May-03 20:23 by eaarmas
Image text-base: 0x600089A8, data-base: 0x61924000
ROM: System Bootstrap, Version 11.1(7)AX [kuong (7)AX], EARLY DEPLOYMENT
RELEASE SOFTWARE (fc2)
FRS uptime is 5 hours, 15 minutes
System returned to ROM by reload
System restarted at 15:40:09 HKT Fri Dec 12 2003
System image file is "flash:c3620-jk8o3s-mz.122-4.t6.bin"
cisco 3620 (R4700) processor (revision 0x81) with 61440K/4096K bytes of
memory.
Processor board ID 07123827
R4700 CPU at 80Mhz, Implementation 33, Rev 1.0
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
1 Ethernet/IEEE 802.3 interface(s)
1 Token Ring/IEEE 802.5 interface(s)
2 Serial network interface(s)
4 Low-speed serial(sync/async) network interface(s)
DRAM configuration is 32 bits wide with parity disabled.
29K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
Best Regards,
William Chen
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