R3721-F3210-F3171-HP High-End Firewalls System Management and Maintenance Command Reference-6PW101

Field Descri

tion

MPLS Label=100048 Exp=0 TTL=1

S=1

ICMP timeout packets on an MPLS network, carry MPLS label

information:

• Label—Label value that is used to identify a forwarding

equivalence class (FEC)

• Exp—Reserved, usually used for class of service (CoS).

• TTL—TTL value

• S—MPLS supports multiple levels of labels. Value 1 indicates that

the label is at the bottom of the label stack, and value 0 indicates

that the label is not at the bottom of the label stack.

tracert ipv6

Syntax

timeout ] * host

View

Any view

Default level

0: Visit level

Parameters

-f first-ttl: Specifies the first TTL, (allowed number of hops for the first packet). It ranges from 1 to 255 and

defaults to 1, and must be less than the maximum TTL.

-m max-ttl: Specifies the maximum TTL, (maximum allowed number of hops for a packet). It ranges from

1 to 255 and defaults to 30, and must be greater than the first TTL.

-p port: Specifies the UDP port number of the destination, which ranges from 1 to 65535 and defaults to

33434. It is unnecessary to modify the port argument.

-q packet-number: Specifies the number of probe packets sent each time, which ranges from 1 to 65535

and defaults to 3.

-w timeout: Specifies the timeout time of the reply packet of a probe packet, which ranges from 1 to

65535 milliseconds and defaults to 5000 milliseconds.

host: IPv6 address or host name of the destination, which is a string of 1 to 46 characters.

-vpn-instance vpn-instance-name: Specifies the VPN to which the destination belongs, where the

vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If the destination is on the

public network, do not specify this option.

Description

Use tracert ipv6 to view the path the IPv6 packets traverse from source to destination.

After having identified network failure with the ping ipv6 command, you can use the tracert ipv6

command to determine the failed node(s).

Output from the tracert ipv6 command includes IPv6 addresses of all the Layer 3 devices the packets

traverse from source to destination. If a device times out, asterisks (* * *) are displayed.