Hi All, Does anyone know RFC2547 VPN discussion group ? I can only find generic MPLS discussion from IETF. Better cisco oriented, because we use Cisco RFC2547 solution. Here is one of the problem we encountered now. Can anyone help ? We have 3 PEs connected with 3 CEs. PE1, PE2 are in the same AS4134, while PE3 in AS41340. It's not so luck that PE1 and PE3 is not back-to-back connected, but can be reached via a tag-switching enabled intermediate network. PE1-PE2 has MP-iBGP peer, while PE1-PE3 has MP-eBGP peer. Then we verify the traffic, and see that CE3, CE1 can ping each other, while CE3 can't ping CE2 ? But all three CEs can see prefix from other CEs. AS4134 AS41340 |----| |---| |---| |CE1 |-------|PE1|--(Tag switching )--|PE3| |----| |---| enabled inter- |---| | mediate network | | | | |---| | |CE3| |----| |---| |---| |CE2 |-------|PE2| |----| |---| BTW, We run PE on IOS Version 12.1(5)T6 regards, Yu Ning ____________________________________________ (Mr.) Yu Ning, Chief Engineer ChinaNET(AS4134) Sr. Sup.& New Sev. R&D Internet Product Dep. DCB, China Telecom Beijing, P.R.China +86-10-62072357/62072354 ____________________________________________