Technical data

10 Brocade 6910 Ethernet Access Switch Diagnostic Guide

53-1002348-02

Testing network connectivity

You can test connectivity to other network devices by pinging those devices. You also can trace

routes.

Pinging an IP address

To verify that a Brocade 6910 switch can reach another device through the network, enter the ping

command at the Normal Exec or Privileged Exec level of the CLI, or enter the ping6 command at the

Privileged Exec level of the CLI.

ping

Syntax: ping {ipv4-addr | hostname} [count num] [size byte]

• ipv4-addr - Specifies the IP address of the device.

• hostname - Specifies the host name.

• count num - Specifies how many ping packets the device sends.

• size byte - Specifies the size of the ICMP data portion of the packet.

NOTE

If you address the ping to the IP broadcast address, the device lists the first four responses to the

ping.

ping6

Syntax: ping6 {ipv6-addr | hostname} [count num] [size byte]

• ipv6-addr - Specifies 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 eight 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.

NOTE

The same link-local address may be used by different interfaces or 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.

• hostname - Specifies a host name string that can be resolved into an IPv6 address through a

domain name server.

• count num - Specifies how many ping packets the device sends.

• size byte - Specifies the size of the ICMP data portion of the packet.