4000 Router Series Network Management and Monitoring Command Reference

-m interval: Specifies the interval (in milliseconds) to send an ICMPv6 echo reply. The interval argument

is in the range of 1 to 65535. The default value is 1000.

-q: Displays only statistics. If this keyword is not specified, all information including the statistics is

displayed.

-s packet-size: Specifies length (in bytes) of an ICMPv6 echo request (not including the IPv6 packet

header and the ICMPv6 packet header). The packet-size argument is in the range of 20 to 8100. The

default value is 56.

-t timeout: Specifies the timeout time (in milliseconds) of an ICMPv6 echo reply. The timeout argument is

in the range of 0 to 65535. The default value is 2000.

-tc traffic-class: Specifies the traffic class value in an IPv6 ICMP packet. The value range is 0 to 255 and

the default is 0.

-v: Displays detailed information (including the dst field and the idx field) about ICMPv6 echo replies. If

this keyword is not specified, the system only displays brief information (not including the dst field and the

idx field) about ICMPv6 echo replies.

-vpn-instance vpn-instance-name: Specifies the MPLS L3VPN instance 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.

-i interface-type interface-number: Specifies an outbound interface by its type and number. This option

must be specified when the destination address is a multicast address or a link local address. If this

option is not specified, the ICMP echo request sending interface is determined by searching the routing

table or forwarding table according to the destination IP address.

host: IPv6 address or host name for the destination. The host name is a case-insensitive string of 1 to 253

characters, which can contain letters, digits, and special characters such as hyphen (-), underscore (_),

and dot (.).

Usage guidelines

To use the name of the destination host to perform the ipv6 ping operation, you must first configure DNS

on the device. Otherwise, the ipv6 ping operation fails.

To abort the ping ipv6 operation during the execution of the command, press the break key sequence

combination (Ctrl+C by default).

Examples

# Test whether the IPv6 address (2001::2) is reachable.

<Sysname> ping ipv6 2001::2

Ping6(56 data bytes) 2001::1 --> 2001::2, press escape sequence to break

56 bytes from 2001::2, icmp_seq=0 hlim=64 time=62.000 ms

56 bytes from 2001::2, icmp_seq=1 hlim=64 time=23.000 ms

56 bytes from 2001::2, icmp_seq=2 hlim=64 time=20.000 ms

56 bytes from 2001::2, icmp_seq=3 hlim=64 time=4.000 ms

56 bytes from 2001::2, icmp_seq=4 hlim=64 time=16.000 ms

--- Ping6 statistics for 2001::2 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 4.000/25.000/62.000/20.000 ms

# Test whether the IPv6 address (2001::2) is reachable. Only the summary statistics are displayed.

<Sysname> ping ipv6 –q 2001::2