[c-nsp] OSPF over multilink

[Rodney Dunn]

OSPF spf shouldn't take 30-40 seconds of traffic
down.

I'm with Robert.  It's most likely the other
side is waiting for the keepalives to time
out to bring the other side of the link
down.

If it were a true layer 1 fault in the circuit
path both sides should go down much quicker
than that but it's not always the case that
the circuit gear works correctly.

Set the keepalive on the member links of
the bundle down and see if that fixes it.

Changing the keepalive at the MLPPP interface
level doesn't do anything.

And why is CEF turned off on the MLPPP interface?
That's not a good idea.

Rodney

On Tue, Jan 11, 2005 at 09:40:21AM -0000, McCallum, Robert wrote:
> set your keepalive on the serial interfaces to 1 second.
> 
> Robert McCallum 
> CCIE #8757 R&S
> 
> 
> > -----Original Message-----
> > From: Joe Shen [mailto:sj_hznm at yahoo.com.cn] 
> > Sent: 11 January 2005 09:38
> > To: Marcus Keane; Mrt Murat
> > Cc: cisco-nsp at puck.nether.net
> > Subject: RE: [c-nsp] OSPF over multilink
> > 
> > 
> > Maybe OSPF ECMP is another choice if enough IP address
> > is available.
> > 
> > Joe
> > 
> >  --- Marcus Keane <mkeane at microsoft.com> µÄÕýÎÄ£º
> > > Hi,
> > > 
> > > It's probably the cost changing (and consequent SPF
> > > recalculation) when
> > > one of the constituent parts of the bundle goes
> > > down. Try hard coding
> > > the cost with "ip ospf cost X".
> > > Marcus
> > > 
> > > > -----Original Message-----
> > > > From: cisco-nsp-bounces at puck.nether.net
> > > [mailto:cisco-nsp-
> > > > bounces at puck.nether.net] On Behalf Of Mrt Murat
> > > > Sent: Tuesday, 11 January 2005 18:23
> > > > To: cisco-nsp at puck.nether.net
> > > > Subject: [c-nsp] OSPF over multilink
> > > > 
> > > > hi,
> > > > i want to ask a question about ospf over multilink
> > > configuration. In
> > > our
> > > > ospf backbone ,we configured links between each
> > > peer  routers  with
> > > ppp
> > > > multilink, you could find this configuration
> > > below. but when one of
> > > the
> > > > links, included in the ppp multilink, goes down ,
> > > data transfer over
> > > > multilink stop approximately 30-40 second then
> > > again start passing to
> > > > other site. when we disable multilink config ,
> > > this problem can not
> > > occur.
> > > > 
> > > > interface Multilink1
> > > >  ip address 10.0.252.9 255.255.255.252
> > > >  no ip directed-broadcast
> > > >  no ip route-cache cef
> > > >  no ip route-cache
> > > >  ip ospf network point-to-point
> > > >  no cdp enable
> > > >  ppp multilink
> > > >  multilink-group 1
> > > > 
> > > > interface Serial4/0/0
> > > >  no ip address
> > > >  no ip directed-broadcast
> > > >  encapsulation ppp
> > > >  no ip route-cache distributed
> > > >  no cdp enable
> > > >  ppp multilink
> > > >  multilink-group 1
> > > > 
> > > > ...
> > > > ...
> > > > ...
> > > > 
> > > > ..
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > thanks for all help,
> > > > taha
> > > > _______________________________________________
> > > > cisco-nsp mailing list  cisco-nsp at puck.nether.net 
> > > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > > archive at
> > > http://puck.nether.net/pipermail/cisco-nsp/
> > > 
> > > _______________________________________________
> > > cisco-nsp mailing list  cisco-nsp at puck.nether.net 
> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > archive at
> > > http://puck.nether.net/pipermail/cisco-nsp/
> > >  
> > 
> > _________________________________________________________
> > Do You Yahoo!?
> > ×¢²áÊÀ½çÒ»Á÷Æ·ÖʵÄÑÅ»¢Ãâ·ÑµçÓÊ
> http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/