Design Guide

Chapter 9 Layer 2 Control Protocol Forwarding
The Layer 2 Control Protocol forwarding bahaviors are different between the set of CISCO
ASR 9000 and ME and ASR platforms.
CISCO ME3600X/3800X and CISCO ASR 903 behaviour and configuration
• By default all layer 2 control frames are dropped on the EFP.
• The layer 2 control protocol forwarding is enabled using the command “l2protocol forward”
• By enabling just the command “ l2protocol forwarding” All layer 2 control protocols will be
forwarded.
• There is also a flexibility to forward a particular set of protocols as well by mentioning
CISCO ME3600X/3800X and CISCO ASR 903 Configuration
ME3600-1(config-if-srv)#l2protocol forward ?
R4 Reserved Protocol using DA Mac 0180.C200.0004
R5 Reserved Protocol using DA Mac 0180.C200.0005
R6 Reserved Protocol using DA Mac 0180.C200.0006
R8 Reserved Protocol using DA Mac 0180.C200.0008
R9 Reserved Protocol using DA Mac 0180.C200.0009
RA Reserved Protocol using DA Mac 0180.C200.000A
RB Reserved Protocol using DA Mac 0180.C200.000B
RC Reserved Protocol using DA Mac 0180.C200.000C
RD Reserved Protocol using DA Mac 0180.C200.000D
RF Reserved Protocol using DA Mac 0180.C200.000F
cdp Cisco Discovery Protocol
dtp Dynamic Trunking Protocol
elmi ELMI Protocol
esmc ESMC Protocol
lacp LACP Protocol
lldp Link Layer Discovery Protocol
loam Link OAM Protocol
pagp Port Aggregation Protocol
ptppd PTP Peer Delay Protocol
stp Spanning Tree Protocol
udld UDLD Protocol
vtp Vlan Trunking Protocol
<cr>