From: Huy Luu (hluu@xxxxxxxxxxxx)
Date: Wed Mar 20 2002 - 18:58:40 GMT-3
Your config works.
What did you mean by no auto did not apply to EBGP?
So why does no auto command prevent route from being advertise? In your
config if you disable autosummary and use a network statement 14.1.1.0,
should this network be advertised as a /24 anyway, without the use of the
mask command? My router did not advertise in this condition.
I gues the main question is that how is the auto summary use in regards to
IBGP and EBGP.
Thanks
MADMAN
<dmadlan@qwest To: Huy Luu <hluu@veroxity.com>
.com> cc: Tshon <tshon@netzero.net>, cci
elab@groupstudy.com, Lab Candidate
<labccie@yahoo.com>, nobody@groupstud
y.com
03/20/02 04:20 Subject: Re: BGP routes don't show
up in BGP table
PM
Please respond
to dmadlan
No auto wouldn't apply as this is an EBGP connection.
I did the same thing you are doing and it worked either way. I used a
loopback with an address of 14.1.1.0/24:
Remember you need to reset the BGP session or enable soft
reconfigurations for the advertisement change to take effect.
This works only because I have left the default auto-summ. Reenable
auto-summ and it should work
router bgp 100
no synchronization
bgp log-neighbor-changes
bgp graceful-restart restart-time 120
bgp graceful-restart stalepath-time 360
bgp graceful-restart
network 14.0.0.0
neighbor 32.1.1.2 remote-as 100
neighbor 111.2.2.2 remote-as 200
neighbor 111.2.2.2 ebgp-multihop 2
neighbor 111.2.2.2 update-source Loopback10
C7500MIX#sh ip bgp nei 111.2.2.2 advertised-routes
BGP table version is 39, local router ID is 222.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i 5.0.0.0 32.1.1.2 2 100 0 ?
*>i 10.0.0.0 32.1.1.2 2 100 0 ?
*> 14.0.0.0 0.0.0.0 0 32768 i
Then change the network statement under bgp and clear the BGP session:
router bgp 100
no synchronization
bgp log-neighbor-changes
bgp graceful-restart restart-time 120
bgp graceful-restart stalepath-time 360
bgp graceful-restart
network 14.1.1.0
neighbor 32.1.1.2 remote-as 100
neighbor 111.2.2.2 remote-as 200
neighbor 111.2.2.2 ebgp-multihop 2
neighbor 111.2.2.2 update-source Loopback10
C7500MIX#sh ip bgp nei 111.2.2.2 adver
BGP table version is 39, local router ID is 222.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i 5.0.0.0 32.1.1.2 2 100 0 ?
*>i 10.0.0.0 32.1.1.2 2 100 0 ?
*> 14.0.0.0 0.0.0.0
Huy Luu wrote:
>
> 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.com>
> .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>
> >
> >
> >
> >
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:57:15 GMT-3