From: CCIE yong (ccie_yong@xxxxxxxxxxx)
Date: Wed Aug 22 2001 - 00:40:30 GMT-3
Hi,
Ya, I think the BRI inter will sometimes up & down even ospf demand circuit
is configured.
Correct me If I'm wrong, What I think the reason of causing the BRI to dial
(up & down) mainly because if the redistribution of that PARTICULAR ROUTER's
connected network is being redistributed back to the ospf again,the change
of LSA thus cause the BRI to dial,
IS there any other reasons that cause the BRI to up & down beside the above
?
does it mean that if we were to filter the connected network from ospf, then
the bri interface will NOT be up & down.
appreciate your advise.
thanks
yonger
>From: Brian <signal@shreve.net>
>Reply-To: Brian <signal@shreve.net>
>To: "SALMON, MARK (SBMS)" <MARK.SALMON@cingular.com>
>CC: "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
>Subject: Re: Demand Circuit revisited
>Date: Tue, 21 Aug 2001 20:04:31 -0500 (CDT)
>
>You just use a demand circuit. this prevents OSPF LSA's from bringing the
>link up, aging ones anyways, new LSA's should always bring it up.
>
>When you have redistribution going on, you may have to filter those
>specific networks, such as your connected network (and possibly /32's
>associated with the the dialer interfaces), so that they don't cause the
>link to go up and down. The first step is determining which specific
>LSA's are changing in the database causing the link to go up and down, and
>then filter as needed.
>
>Brian
>
>
>On Tue, 21 Aug 2001, SALMON, MARK (SBMS) wrote:
>
> > My dilemma, I have OSPF demand circuit configured on ISDN/Dialer
>interfaces.
> > I have blocked OSPF multicasts to prevent dialer bouncing. The 64k
>question
> > is how to get the demand circuit up so full adjacency is reached while
> > preventing OSPF LSPs/LSAs from causing the like to bounce up and down.
>On
> > both sides redistributed routes or the link to OSPF backbone can cause
> > changes in the LSDB to cause flooding over the ISDN line.
> >
> > One option I see is to use dialer watch while maintaining the OSPF
>multicast
> > filtering access list. Any thoughts? Anyone have any other ideas
>(assume
> > that snapshot routing for IPX is NOT configured)
> >
> > Mark Salmon
> > Sr. WAN Engineer Great Lakes Region
> > Cingular Wireless
> > 2000 Ameritech Center Drive 3F07B
> > Hoffman Estates IL 60195
> > Voice: (847)765-3999
> > Pager: (847)992-0458
> > Email: mark.salmon@cingular.com
> > **Please read:http://www.groupstudy.com/list/posting.html
>-----------------------------------------------
> I'm buying / selling used CISCO gear!!
> email me for a quote
>
>Brian Feeny, CCIE #8036 Scarlett Parria
>signal@netjam.net scarlett@netjam.net
>318-213-4709 318-213-4701
>
>Netjam, LLC http://www.netjam.net
>333 Texas St. VISA/MC/AMEX/COD
>Suite 1401 30 day warranty
>Shreveport, LA 71101 Cisco Channel Partner
>toll free: 866-2NETJAM
>phone: 318-212-0245
>fax: 318-212-0246
>**Please read:http://www.groupstudy.com/list/posting.html
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:31:55 GMT-3