The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: Info On DLCI/VPI VCI as the Label
This is assuming your message meant ATM Labels in a cell, and not MPLS Labels. It is split up into VPI/VCI, in this manner, for a UNI ATM Cell Header: VPI (Virtual Path Identifier) Second four bits of Byte 1 and the first four bits of Byte 2 VCI (Virtual Channel Identifier) Second four bits of Byte 2, Byte 3, and the first four bits of Byte 4 If you want the cells full header: GFC (Generic Flow Control)1 First four bits of Byte 1 VPI (Virtual Path Identifier) Second four bits of Byte 1 and the first four bits of Byte 2 VCI (Virtual Channel Identifier) Second four bits of Byte 2, Byte 3, and the first four bits of Byte 4 PT (Payload Type) The fifth, sixth, and seventh bits of Byte 4 CLP (Cell Loss Priority) Eighth bit of Byte 4 HEC (Header Error Control) Byte 5 Mike Gibbs > -----Original Message----- > From: J.C.Ramesh Babu [mailto:rameshbabu_j@inf.com] > Sent: Friday, December 07, 2001 12:41 AM > To: mpls-ops@mplsrc.com > Subject: Info On DLCI/VPI VCI as the Label > > > Hi All, > > When we think of ATM as the Layer 2 technology, we know that > VPI/VCI is > considered as the Label (identifier). But I'm eager to know > how a label (the > exact format in terms of bits and bytes) looks like. > Can someone kindly educate me on this? > > Thanks in advance > > J.C.Ramesh Babu > > E-mail : rameshbabu_j@infy.com > : rj52@casc.com > Ph :91-80-852 0261 Ext:1933 (O) > :91-80-6097077 (R) > > > ------- > 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 |
|