From: Huy Luu (hluu@xxxxxxxxxxxx)
Date: Wed Mar 20 2002 - 17:05:06 GMT-3
I got it to work, by adding the additional mask command.
But I'm still confuse. First I used the network 1.1.1.0, which did not
work. I also added no sync and no auto-summary, which did not work. I
thought that if I use the network command to advertise a network, and if I
have a valid route to a subnet of that network, it should advertise the
network and auto summarize at the classful boundary. In this example the
router should summarize and advertise 1.0.0.0/8 if I use the network
statement 1.1.1.0, but it did not.
Tshon
<tshon@netzero To: Lab Candidate <labccie@yahoo.c
om>
.net> cc: ccielab@groupstudy.com
Sent by: Subject: Re: BGP routes don't show
up in BGP table
nobody@groupst
udy.com
03/20/02 02:31
PM
Please respond
to Tshon
You will only advertis networks you can reach. You don't have a network
1.1.1.1 in your routing table.
You don't have a network 2.2.2.2 in your routing table. Try Network
1.1.1.0 and 2.2.2.0.
Tshon
Lab Candidate wrote:
>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 statement.
>but somehow they never showed up in the other's BGP table. What am I doing
wrong?
>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
Protocol
>
>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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