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
At 10:05 AM 9/10/2002, Amos Rosenboim wrote: >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. That's called "VRF-select" feature in Cisco IOS. It is available in 22S. This was also discussed earlier in another thread. Cheers, Rajiv >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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