[c-nsp] OSPF over multilink - Rodney Dunn - net.nether.puck.cisco-nsp

5 messages in net.nether.puck.cisco-nsp[c-nsp] OSPF over multilink

From	Sent On	Attachments
Mrt Murat	Jan 11, 2005 2:24 am
Marcus Keane	Jan 11, 2005 3:03 am
Joe Shen	Jan 11, 2005 4:37 am
McCallum, Robert	Jan 11, 2005 4:41 am
Rodney Dunn	Jan 11, 2005 11:33 am

	Permalink for this message Paste this link in email or IM:
	Permalink for this thread Paste this link in email or IM:
	Atom feed for this thread Paste this URL into your reader:

Subject:	[c-nsp] OSPF over multilink	Actions...
From:	Rodney Dunn (rod...@cisco.com)
Date:	Jan 11, 2005 11:33:58 am
List:	net.nether.puck.cisco-nsp

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_h...@yahoo.com.cn] Sent: 11 January 2005 09:38 To: Marcus Keane; Mrt Murat Cc: cisc...@puck.nether.net Subject: RE: [c-nsp] OSPF over multilink

Maybe OSPF ECMP is another choice if enough IP address is available.

--- Marcus Keane <mke...@microsoft.com> ????????

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: cisc...@puck.nether.net [mailto:cisco-nsp- boun...@puck.nether.net] On Behalf Of Mrt Murat Sent: Tuesday, 11 January 2005 18:23 To: cisc...@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

http://puck.nether.net/pipermail/cisco-nsp/

http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/

	Start a set with this search
	Include this search in one of my sets
	Exclude this search from one of my sets
	Permalink to these results Paste this link in email or IM:
	Atom feed for tracking future search results Paste this URL into your reader: