Re: Question regarding BGP route exchange

From: Saketh R (saketh2083@gmail.com)
Date: Sat Nov 15 2008 - 22:33:35 ARST


Hi Hyunseog/Tolulope,

Thanks for your reply.To answer your questions....The neighbor state is
Established.There is no updates being sent on by either routers and also I
have configured BGP no sync .

I am attaching the show neighbor output...

R1#sh ip bgp neighbors 155.1.146.4
BGP neighbor is 155.1.146.4, remote AS 3, external link
  BGP version 4, remote router ID 155.1.146.4
  BGP state = Established, up for 02:41:48
  Last read 00:00:48, last write 00:00:48, hold time is 180, keepalive
interval is 60 seconds
  Neighbor capabilities:
    Route refresh: advertised and received(old & new)
    Address family IPv4 Unicast: advertised and received
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
                         Sent Rcvd
    Opens: 3 3
    Notifications: 0 0
    Updates: 0 0
    Keepalives: 182 182
    Route Refresh: 0 0
    Total: 185 185
  Default minimum time between advertisement runs is 30 seconds

 For address family: IPv4 Unicast
  BGP table version 1, neighbor version 1/0
 Output queue size : 0
 Output queue size : 0
  Index 2, Offset 0, Mask 0x4
  2 update-group member
                                 Sent Rcvd
  Prefix activity: ---- ----
    Prefixes Current: 0 0
    Prefixes Total: 0 0
    Implicit Withdraw: 0 0
    Explicit Withdraw: 0 0
    Used as bestpath: n/a 0
    Used as multipath: n/a 0

                                   Outbound Inbound
  Local Policy Denied Prefixes: -------- -------
    Total: 0 0
  Number of NLRIs in the update sent: max 0, min 0

  Connections established 3; dropped 2
  *Last reset 02:46:01, due to Peer closed the sessionConnection is ECN
Disabled, Mininum incoming TTL 0, Outgoing TTL 1*
Local host: 155.1.146.1, Local port: 179
Foreign host: 155.1.146.4, Foreign port: 46858

Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x1FAB0480):
Timer Starts Wakeups Next
Retrans 169 0 0x0
TimeWait 0 0 0x0
AckHold 169 165 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 0 0 0x0
DeadWait 0 0 0x0

Thanks in advance!!

Madhu

On Sat, Nov 15, 2008 at 2:52 PM, Hyunseog Ryu <r.hyunseog@ieee.org> wrote:

> Did you configure "no sync" under "router bgp" configuration?
>
>
>
> Saketh R wrote:
> > Hi All,
> > I have a very simple scenario.
> >
> >
> R2--------R3-----R1-----------------------------------------------------R4
> > AS-2
> > AS-3
> > 155.1.146.1
> 155.1.146.4
> >
> > I see that the BGP connections are established between the two routers.
> >
> > *BGP neighbor is 155.1.146.4, remote AS 3, external link
> > BGP version 4, remote router ID 155.1.146.4
> > BGP state = Established, up for 00:38:01
> > Last read 00:00:01, last write 00:00:01, hold time is 180, keepalive
> > interval is 60 seconds
> > *
> > **
> > But there is no routes that are being adverised by either R4 or R1. I
> have a
> > couple of routers connnected behind running BGP in AS2.All the routers
> have
> > connection established but they don't advertise the routes either in ebgp
> > session or ibgp session.
> >
> >
> > R1#sh ip bgp neighbors 155.1.146.4 advertised-routes
> >
> > Total number of prefixes 0
> >
> > R4#sh ip bgp neighbors 155.1.146.1 advertised-routes
> >
> > Total number of prefixes 0
> > R4#
> >
> >
> > I would greatly appreciate if someone can tell me if I am missing
> something.
> >
> >
> >
> > Thanks in Advance for your clarification!!!
> >
> > Regards
> >
> > Saketh
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net



This archive was generated by hypermail 2.1.4 : Mon Dec 01 2008 - 08:18:30 ARST