The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: Why Multiprotocaol?
Just stating the obvious, but once you have an L2VPN, the provider really has no concern or immediate knowledge as to what is being sent by the customer devices. There could be IPX, SNA/APPN, NetBIOS, DDP, and a host of other un-mentionables. The answer here is the same as for the question of "Does Frame-Relay support IPX?". By switching based on the fixed length MPLS label, as opposed to some specific L2/L3 field, you achieve a protocol agnostic solution, just as with ATM and Frame. As far as MPLS running on top of IP, I would clarify that the forwarding plane has no need for IP or IP related IGPs. The control plane (LDP/RSVP) happens to use an IP infrastructure, but similar signaling is possible w/o IP, as in the ATM forum's PNNI/UNI Many (mostly at Nortel) saw ATM technology as the signaling plane for MPLS at one point. As a case in point, you can configure static LSPs today on a juniper with no IGP or IP addressing in place. -----Original Message----- From: Lars Higham [mailto:lhigham@yahoo.com] Sent: Monday, July 28, 2003 7:51 PM To: bhavesh_modi@da-iict.org; mpls-ops@mplsrc.com Subject: RE: [MPLS-OPS]: Why Multiprotocaol? Ipv4, ipv6, l3vpn, l2vpn; I'm not aware of anyone using it for IPX - -----Original Message----- From: Bhavesh Modi [mailto:bhavesh_modi@da-iict.org] Sent: Monday, July 28, 2003 8:06 PM To: mpls-ops@mplsrc.com Subject: [MPLS-OPS]: Why Multiprotocaol? Why we call it Multiprotocol? Because supprort for multiple routing protocols (BGP, OSPF, IS-IS etc.)? or Because support for multiple layer 3 protocols (IP, IPX etc.)? Thanks. -Bhavesh Modi ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
|
|