[quagga-users 7382] Re: Why does Bgp4 Router reset bgp session by itself ?

Bulent Kolay bmalik at ihlas.net.tr
Thu Aug 3 16:46:08 IST 2006


I checked it. the quagga box can ping at the cisco router.
I also checked that I have ping between during the time the bgp4 connection
is established.
Might that condition cause be an exploit ?

What shall I do ?


----- Original Message ----- 
From: "Rumen Svobodnikov" <rumen at l2.tu-varna.edu>
To: "Bulent Kolay" <bmalik at ihlas.net.tr>
Cc: <quagga-users at lists.quagga.net>
Sent: Thursday, August 03, 2006 3:19 PM
Subject: Re: [quagga-users 7380] Re: Why does Bgp4 Router reset bgp session
by itself ?


>
> Check if full size (1500 bytes) IP packets can pass between the cisco and
> the quagga box.
> From the quagga box - ping -s 1472 x.x.x.x
> Also possibility two - maybe when the BGP session comes up the cisco
> receives some annoucements which cause it to loose route to the quagga
> box. Please check if you have ping between the two during the time the
> GP connection is established.
>
> Best Regards,
> Rumen Svobodnikov
>
> On Thu, 3 Aug 2006, Bulent Kolay wrote:
>
> > I looked at that message. the message is below:
> >  Last reset 00:00:04, due to BGP Notification received, hold time
expired
> >
> >
> > 7120#show ip bgp neighbors X.X.X.X
> > BGP neighbor is X.X.X.X,  remote AS 9563, external link
> >   BGP version 4, remote router ID 0.0.0.0
> >   BGP state = Idle
> >   Last read 00:00:04, hold time is 180, keepalive interval is 60 seconds
> >   Received 804493 messages, 16 notifications, 0 in queue
> >   Sent 594 messages, 0 notifications, 0 in queue
> >   Route refresh request: received 0, sent 0
> >   Minimum time between advertisement runs is 30 seconds
> >
> >  For address family: IPv4 Unicast
> >   BGP table version 4108013, neighbor version 0
> >   Index 1, Offset 0, Mask 0x2
> >   Inbound path policy configured
> >   Outbound path policy configured
> >   Incoming update AS path filter list is 7
> >   Outgoing update AS path filter list is 10
> >   0 accepted prefixes consume 0 bytes
> >   Prefix advertised 519, suppressed 0, withdrawn 0
> >
> >   Connections established 22; dropped 22
> >   Last reset 00:00:04, due to BGP Notification received, hold time
expired
> >   No active TCP connection
> >
> >
> > ----- Original Message -----
> > From: "Rumen Svobodnikov" <rumen at l2.tu-varna.edu>
> > To: "Bulent Kolay" <bmalik at ihlas.net.tr>
> > Sent: Thursday, August 03, 2006 3:05 PM
> > Subject: Re: [quagga-users 7379] Re: Why does Bgp4 Router reset bgp
session
> > by itself ?
> >
> >
> > >
> > > On the cisco type:
> > > show ip bgp neighbors x.x.x.x
> > > (where x.x.x.x is the IP address of the quagga bgp peer)
> > > Somewhere it should say: Last reset xxxx, due to xxxxxxxxxx
> > >
> > > There you can see what is the reason for dropping the BGP session.
> > >
> > > best regards,
> > > Rumen Svobodnikov
> > >
> > > On Thu, 3 Aug 2006, Bulent Kolay wrote:
> > >
> > > > But The router has not run out of memory. I had look at that
carefully.
> > > > I looked at the bgp session again "sh ip bgp summary" . Exactly
after 90
> > > > seconds the session was reset by the router.
> > > > That's very strange.
> > > >
> > > > How can I get rid off that ?
> > > >
> > > > Thanks
> > > >
> > > > ----- Original Message -----
> > > > From: "Paul Cairney" <paul at cairney.me.uk>
> > > > To: "Bulent Kolay" <bmalik at ihlas.net.tr>
> > > > Cc: <quagga-users at lists.quagga.net>
> > > > Sent: Thursday, August 03, 2006 2:08 PM
> > > > Subject: Re: [quagga-users 7378] Why does Bgp4 Router reset bgp
session
> > by
> > > > itself ?
> > > >
> > > >
> > > > > On Thu, Aug 03, 2006 at 01:25:37PM +0300, Bulent Kolay wrote:
> > > > > >    I  have  2  routers. the first  of  them is quagga and other
> > router
> > > > is
> > > > > >    cisco7120.
> > > > > ..
> > > > > >    ciscorouter installed bgp session about 90 seconds.
> > > > > >    I  don't  think  there is no memory problem. it has enough
memory
> > > > (128
> > > > > >    Mbyte)
> > > > >
> > > > > If you are trying to put a full table (190k prefixes) on the 7120
you
> > will
> > > > almost certainly need more than 128mb ram. I belive all the 71x0
routers
> > > > support 256mb, the official cisco memory kit is 2x 128mb pc100
dimm's
> > > > however I have one 7120 that seemed happy with a single 256mb stick.
> > > > >
> > > > > It may be useful to post 'sh ver', 'sh mem stat' and 'sh ip bgp
sum'
> > from
> > > > the cisco along with a 'sh ip bgp sum' from the quagga.
> > > > >
> > > > > Regards,
> > > > >
> > > > > Paul
> > > > >
> > > > >
> > > >
> > > > _______________________________________________
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> > > > Quagga-users at lists.quagga.net
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> > > >
> > >
> > >
> >
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>
>



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