The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: Problem with MPLS over DSL
Hi Garry, Try changing the tag-switching mtu to 1526 Cheers, MK -----Original Message----- From: Garry Glendown [mailto:garry@regio.net] Sent: 6/Feb/2005 12:00 AM To: mpls-ops@mplsrc.com Subject: [MPLS-OPS]: Problem with MPLS over DSL Hi, I've been working on our backup link, which is a multilink PPP connection over a DSL link. I've gotten the basic link and stuff running so far, but MPLS is still giving me some headache ... I think I have all the MTU setting correct (MTU, adjust mss, etc.), and am at a point where the routers just puzzle me ... The backup link has a 7200 on each side, one with l2tp dialin, the other with a PA4E for PPPoE dialout. I have configured the dialin side (via Radius) to enable tag-switching, which works out fine: dsl-gw.ffm#show int vi29 conf Virtual-Access29 is an VPDN link (sub)interface Derived configuration : 300 bytes ! interface Virtual-Access29 mtu 1492 bandwidth 3072 ip unnumbered Loopback1 ip tcp adjust-mss 1452 ip ospf cost 2000 timeout absolute 50 0 tag-switching ip peer default ip address pool dsl-pool keepalive 60 down-when-looped ppp authentication chap pap callin end (+ same for the currently second link) dsl-gw.ffm#show tag-switching interfaces Interface IP Tunnel Operational FastEthernet0/0 Yes (tdp) No Yes Virtual-Access29 Yes (tdp) No Yes Virtual-Access59 Yes (tdp) No Yes Question: When does a Cisco say the tdp is operational? On the other side, I configured the dialer to use mpls: interface Dialer2 mtu 1492 bandwidth 2048 ip address 1.2.3.4 255.255.255.252 ip load-sharing per-packet encapsulation ppp no ip route-cache ip tcp adjust-mss 1452 ip ospf cost 2000 no ip mroute-cache dialer pool 2 dialer-group 2 tag-switching mtu 1452 tag-switching ip Anyway, it is left not operational: Interface IP Tunnel Operational FastEthernet1/0 Yes (tdp) No Yes Dialer2 Yes No No I've tried several debug mpls options, but can't seem to find a reason why it's not working ... Anybody have an idea? Help appreciated, -gg ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml The information in this email and any attachments thereto, may contain information that is confidential, protected by intellectual property rights, and may be legally privileged. It is intended solely for the addressee(s). Access to this email by anyone else is unauthorized. Any use, disclosure, copying, or distribution of the information contained herein by persons other that the designated addressee is unauthorized and may be unlawful. If you are not the intended recipient, you should delete the message immediately from your system. If you believe that you have recieved this email in error, please contact the sender or Qatar Telecom at +974 4400 649. Any views expressed in this email and its attachments are those of the individual sender except where the sender, expressly and with authority, states them to be the views of Qatar Telecom. ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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