C
HAPTER
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| IP Interface Commands
IPv6 Interface
– 1422 –
ping6 This command sends (IPv6) ICMP echo request packets to another node on
the network.
SYNTAX
ping6 {ipv6-address | host-name} [count count] [size size]
ipv6-address - The IPv6 address of a neighbor device. You can
specify either a link-local or global unicast address formatted
according to RFC 2373 “IPv6 Addressing Architecture,” using 8
colon-separated 16-bit hexadecimal values. One double colon may
be used in the address to indicate the appropriate number of zeros
required to fill the undefined fields.
host-name - A host name string which can be resolved into an IPv6
address through a domain name server.
count - Number of packets to send. (Range: 1-16)
size - Number of bytes in a packet. (Range: 48-18024 bytes)
The actual packet size will be eight bytes larger than the size
specified because the router adds header information.
DEFAULT SETTING
count: 5
size: 100 bytes
COMMAND MODE
Privileged Exec
COMMAND USAGE
◆ Use the ping6 command to see if another site on the network can be
reached, or to evaluate delays over the path.
◆ The same link-local address may be used by different interfaces/nodes
in different zones (RFC 4007). Therefore, when specifying a link-local
address, include zone-id information indicating the VLAN identifier after
the % delimiter. For example, FE80::7272%1 identifies VLAN 1 as the
interface from which the ping is sent.
◆ When pinging a host name, be sure the DNS server has been enabled
(see page 1374). If necessary, local devices can also be specified in the
DNS static host table (see page 1376).
◆ When using ping6 with a host name, the switch first attempts to
resolve the alias into an IPv6 address before trying to resolve it into an
IPv4 address.
EXAMPLE
Console#ping6 FE80::2E0:CFF:FE00:FC%1/64
Type ESC to abort.
PING to FE80::2E0:CFF:FE00:FC%1/64, by 5 32-byte payload ICMP packets,
timeout is 3 seconds
response time: 20 ms [FE80::2E0:CFF:FE00:FC] seq_no: 1
response time: 0 ms [FE80::2E0:CFF:FE00:FC] seq_no: 2
response time: 0 ms [FE80::2E0:CFF:FE00:FC] seq_no: 3
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