From: Lab Candidate (labccie@xxxxxxxxx)
Date: Wed Mar 20 2002 - 15:47:48 GMT-3
Here is a basic BGP setup with r1 and r2:
r1 AS100 r2 AS200
s0----------------s0
lo0 1.1.1.1 lo0 2.2.2.2
I am advertising both r1's and r2's loopbacks lo0 by putting under a network st
atement.
but somehow they never showed up in the other's BGP table. What am I doing wron
g?
here is the configs and output from both r1 and r2:
r1#
1d00h: BGP: 192.168.1.2 went from Idle to Active
1d00h: BGP: 192.168.1.2 open active, delay 15324ms
1d00h: BGP: 192.168.1.2 open active, local address 192.168.1.1
1d00h: BGP: scanning routing tables
1d00h: BGP: nettable_scan: invalidate local path for 1.0.0.0/8
1d00h: BGP: nettable_scan: invalidate sourced path for 1.0.0.0/8
1d00h: BGP: no valid path for 1.0.0.0/8
1d00h: BGP: nettable_walker 1.0.0.0/8 no best path
r1#sh ip ro
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, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
C 192.168.1.0/24 is directly connected, Serial0
r1#sh ip bgp
{blank}
r1#
r1#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r1
!
!
ip subnet-zero
!
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
ip address 192.168.1.1 255.255.255.0
no ip directed-broadcast
clockrate 64000
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
router bgp 100
network 1.1.1.1
neighbor 192.168.1.2 remote-as 200
!
ip classless
!
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line aux 0
line vty 0 4
!
end
r1#
r1#sh ip bgp nei
BGP neighbor is 192.168.1.2, remote AS 200, external link
Index 1, Offset 0, Mask 0x2
BGP version 4, remote router ID 2.2.2.2
BGP state = Established, table version = 25, up for 00:03:02
Last read 00:00:03, hold time is 180, keepalive interval is 60 seconds
Minimum time between advertisement runs is 30 seconds
Received 6 messages, 0 notifications, 0 in queue
Sent 6 messages, 0 notifications, 0 in queue
Prefix advertised 0, suppressed 0, withdrawn 0
Connections established 1; dropped 0
Last reset never
0 accepted prefixes consume 0 bytes
0 history paths consume 0 bytes
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 192.168.1.1, Local port: 11000
Foreign host: 192.168.1.2, Foreign port: 179
Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)
Event Timers (current time is 0x545E3C0):
Timer Starts Wakeups Next
Retrans 19 12 0x0
TimeWait 0 0 0x0
AckHold 6 2 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 0 0 0x0
DeadWait 0 0 0x0
iss: 278568032 snduna: 278568157 sndnxt: 278568157 sndwnd: 16260
irs: 2897909981 rcvnxt: 2897910106 rcvwnd: 16260 delrcvwnd: 124
SRTT: 614 ms, RTTO: 4262 ms, RTV: 1517 ms, KRTT: 0 ms
minRTT: 24 ms, maxRTT: 300 ms, ACK hold: 200 ms
Flags: higher precedence, nagle
Datagrams (max data segment is 1460 bytes):
Rcvd: 11 (out of order: 0), with data: 6, total data bytes: 124
Sent: 10 (retransmit: 12), with data: 6, total data bytes: 124
r1#
=================== r2 config and debug =================
r2#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname r2
!
!
ip subnet-zero
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
ip address 192.168.1.2 255.255.255.0
no ip directed-broadcast
!
interface Serial1
no ip address
no ip directed-broadcast
shutdown
!
router bgp 200
network 2.2.2.2
neighbor 192.168.1.1 remote-as 100
!
ip classless
!
!
line con 0
transport input none
line aux 0
line vty 0 4
!
end
r2#
r2#sh ip int b
Interface IP-Address OK? Method Status Protoco
l
Ethernet0 unassigned YES unset administratively down down
Loopback0 2.2.2.2 YES manual up up
Serial0 192.168.1.2 YES manual up up
Serial1 unassigned YES unset administratively down down
r2#sh ip ro
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, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is not set
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
C 192.168.1.0/24 is directly connected, Serial0
r2#sh ip bgp
{blank}
r2#
r2#sh ip bgp nei
r2#sh ip bgp neighbors
BGP neighbor is 192.168.1.1, remote AS 100, external link
Index 1, Offset 0, Mask 0x2
BGP version 4, remote router ID 1.1.1.1
BGP state = Established, table version = 23, up for 00:00:17
Last read 00:00:16, hold time is 180, keepalive interval is 60 seconds
Minimum time between advertisement runs is 30 seconds
Received 3 messages, 0 notifications, 0 in queue
Sent 3 messages, 0 notifications, 0 in queue
Prefix advertised 0, suppressed 0, withdrawn 0
Connections established 1; dropped 0
Last reset never
0 accepted prefixes consume 0 bytes
0 history paths consume 0 bytes
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 192.168.1.2, Local port: 179
Foreign host: 192.168.1.1, Foreign port: 11000
Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)
Event Timers (current time is 0xF02CC):
Timer Starts Wakeups Next
Retrans 4 0 0x0
TimeWait 0 0 0x0
AckHold 3 2 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 0 0 0x0
DeadWait 0 0 0x0
iss: 2897909981 snduna: 2897910049 sndnxt: 2897910049 sndwnd: 16317
irs: 278568032 rcvnxt: 278568100 rcvwnd: 16317 delrcvwnd: 67
SRTT: 710 ms, RTTO: 4442 ms, RTV: 1511 ms, KRTT: 0 ms
minRTT: 16 ms, maxRTT: 300 ms, ACK hold: 200 ms
Flags: passive open, nagle, gen tcbs
Datagrams (max data segment is 1460 bytes):
Rcvd: 6 (out of order: 0), with data: 3, total data bytes: 67
Sent: 6 (retransmit: 0), with data: 3, total data bytes: 67
r2#sh ip bgp neighbors ?
A.B.C.D Neighbor to display information about
<cr>
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