Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 1 MPLS Basic Configuration Commands
3Com Corporation
1-13
vpn: Configures to apply TTL duplication to the VPN packets.
Description
Use the ttl propagate command to enable IP TTL duplication of MPLS.
Use the undo ttl propagate command to disable IP TTL duplication of MPLS.
 Note:
The ttl propagate command is only available with the NE16E, NE08E, and NE05.
Caution:
The configuration of TTL duplication must be the same on all the PEs. If otherwise, the
results of traceroutes cannot reflect the real network conditions.
Related command: tracert and ttl expiration.
Example
# Apply IP TTL duplication of MPLS to VPN packets.
[3Com -mpls] ttl propagate vpn
1.2 LDP Configuration Commands
1.2.1 debugging mpls ldp
Syntax
debugging mpls ldp { { all | main | advertisement | session | pdu | notification }
[ interface interface-type interface-number ] | remote }
undo debugging mpls ldp { all | main | advertisement | session | pdu | notification }
[ interface interface-type interface-number ] | remote }
View
User view
Parameter
all: Displays all debugging information related to LDP.
main: Displays the debugging information of LDP main tasks.