3Com MSR 50, MSR 30 manual Undo ttl expiration pop, Ttl expiration pop command

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-rreply-mode: Specifies the reply mode in response to an echo request message. The reply-modeargument can be 1 or 2. A value of 1 means “Do not response”, while a value of 2 means “Respond using a UDP packet”.

-ttime-out: Specifies the timeout interval for the response to an echo request message. The time-outargument ranges from 0 to 65,535 milliseconds.

ipv4 dest-addr mask: Specifies the LDP Ipv4 destination address and the mask. The mask argument ranges from 0 to 32.

destination-ip-addr-header: Specifies the IP header destination address for the MPLS echo request message, which can be any address on segment 127.0.0.0/8, that is, any local loopback address.

te interface-typeinterface-number: Specifies a tunnel interface by its type and number.

Description Use the tracert lsp command to locate an MPLS LSP error.

Example # Locate an error along the LSP to 3.3.3.9 on host 1.1.1.1.

<Sysname> tracert lsp ipv4 3.3.3.9			32
LSP Trace Route FEC: LDP IPV4 PREFIX 3.3.3.9/32 , press CTRL_C to break.
TTL	Replier	Time	Type	Downstream
0			Ingress	10.4.5.1/[1025]
1	10.4.5.1	1	Transit	100.3.4.1/[1024]
2	100.1.4.2	63	Transit	100.1.2.1/[3]
3	100.1.2.1	129	Egress

ttl expiration

Syntax	ttl expiration pop
	undo ttl expiration pop
View	MPLS view
Parameter	None
Description	Use the ttl expiration pop command to specify that the ICMP response
	message be transported back along the IP route when the TTL of an MPLS packet
	expires.
	Use the undo ttl expiration pop command to specify that the ICMP response
	be transported back along the LSP when the TTL of an MPLS packet expires.
	By default, the ICMP response message of an MPLS packet with a one-level label is
	transported back along the IP route.
	Note that configuring the undo mpls command will remove the configuration of
	the ttl expiration pop command.