The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: MPLS over ISDN PRI
Emmm.... but that could be the reason .. but imagine if you used backup ISDN instead of DDR ,The ISDN will be online all the time .. the only different is the amount of channel that will be available ?. Could it be the the unsolicited disribution and the liberal retention mode that cause the label not converge ? -----Original Message----- From: Amos Rosenboim [mailto:slick@inter.net.il] Sent: Tuesday, September 10, 2002 10:06 PM To: alok; Stefan Oettl; mpls-ops@mplsrc.com Subject: Re: [MPLS-OPS]: MPLS over ISDN PRI I personally don't think this is an mpls problem. I think this is more basic, pri stability issues. First i would get a stable link between the routers, with the ospf stable and ipv4 operating , and only then i would go and try to implement mpls on that link. As far as stefans remark, i don't know about such a limitation but it's very much a possibility. Maybe one of the cisco guys in the list can help in this issue. Thanks Amos ----- Original Message ----- From: "alok" <alok.dube@apara.com> To: "Stefan Oettl" <soettl@freenet.de>; <mpls-ops@mplsrc.com> Sent: Tuesday, September 10, 2002 3:49 PM Subject: Re: [MPLS-OPS]: MPLS over ISDN PRI > i think Amos made a good point on my last mail....its a PE -CE > connection..so no need to support MPLS over that. > > what you cud do is this: > is ur calling end have a fixed ip address or a pool (shud be)... > > assuming u have a seperate ISDN RAS....u wud have some connectivity b/w the > PE and the RAS, u cud use acls on the ethernet connecting to the RAS and put > it into the right vrf...or mpls VPN... > > similarly...if the call terminates on the PE.. and ISDN interfaces cant be > directly put onto the vrf, u cud use acls to filter traffic based on source > ip and put it into the vrf for that mpls vpn... > > i know that filters to vrf mapping seems to work on some routers..not sure > abt cisco though.... > > -rgds > A > ----- Original Message ----- > From: Stefan Oettl <soettl@freenet.de> > To: Saifulazza <Saifulazza@vads.com>; <mpls-ops@mplsrc.com> > Sent: Tuesday, September 10, 2002 5:12 PM > Subject: Re: [MPLS-OPS]: MPLS over ISDN PRI > > > what kind of PE boxes do you use ? > in case of Cisco's you could configure a backup PE-PE or PE-NAS (NAS will > need > MPLS then) GRE tunnel for label switching. > As far as I know MPLS forwarding on (DDR) ISDN / Dialer interfaces isn't > supported directly in IOS up to know. Please someone correct me if I'm wrong > here ... > So you could use GRE encapsulation to tunnel the MPLS frames over the > non-supported circuit. > > cheers, > Stefan > > On Tuesday 10 September 2002 11:08, Saifulazza wrote: > > Hi > > > > Has anybody out have implemented the PE-PE connection being backup by > > ISDN PRI ? . I experienced very unstable connection with the OSPF > adjacency > > flapping most of the time and the VPN can never be developed . > > > > Cheers > > > > > > > > -----Original Message----- > > From: fraanro [mailto:fraanro@arrakis.es] > > Sent: Tuesday, September 10, 2002 4:02 PM > > To: Enrique Torres > > Cc: mpls-ops@mplsrc.com > > Subject: Re: [MPLS-OPS]: tag-switching MTU on c7206 and c3640 > > > > > > You should configure the tagswitching MTU in the Fast Ethernet > > interfaces to be able to hold the MPLS frame with as many shim headers > > as you need. for example 1508 if you want to labels. > > > > mpls mtu 1508 > > > > under the interface configuration. > > > > Rgds. > > Javier. > > > > ----- Mensaje Original ----- > > Remitente: Enrique Torres <entorresa@yahoo.com> > > Fecha: Lunes, Septiembre 9, 2002 8:28 pm > > Asunto: [MPLS-OPS]: tag-switching MTU on c7206 and c3640 > > > > > Hi all > > > > > > I started tag-switching between 2 nodes of my network > > > but there is a problem with the MTU and the packet > > > size after tag imposition. > > > > > > My configuration in each node is it > > > > > > I have a Cisco7206 (IOS 12.1(1)E), it is connected > > > with 6 Cisco 3640 (remote cells) through E1 circuits. > > > Between the C3640 and C7206 I run tag switching > > > because I have configured VPN's. In all these routers > > > is configured "Path MTU Discovery" and our MTU between > > > the c3640 and c7206 is 1530. > > > > > > In this configuration I dont have any problem to send > > > information between clients connected in our c3640's. > > > > > > But when I connect this node with a second node, I > > > must connect the c7206 through a fast ethernet port > > > and run tag-switching over these ports. In this > > > situation I started to have problems with http, ftp or > > > any kind of traffic with large size of packet (greater > > > than 1500bytes). > > > > > > I believe that I have a problem with the MTU after > > > second tag imposition (the impositon between c7206's) > > > > > > Please, could you help me to solve this. > > > > > > Thanks, > > > Enrique. > > > > > > > > > > > > ===== > > > Saludos, > > > Enrique > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > Yahoo! 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