Configuration Guide User guide

370 FastIron Configuration Guide
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IPv6 management (IPv6 host support)
Configuring name-to-IPv6 address resolution using
IPv6 DNS resolver
The Domain Name Server (DNS) resolver feature lets you use a host name to perform Telnet and
ping commands. You can also define a DNS domain on a Brocade device and thereby recognize all
hosts within that domain. After you define a domain name, the Brocade device automatically
appends the appropriate domain to the host and forwards it to the domain name server.
For example, if the domain “newyork.com” is defined on a Brocade device, and you want to initiate
a ping to host “NYC01” on that domain, you need to reference only the host name in the command
instead of the host name and its domain name. For example, you could enter either of the following
commands to initiate the ping.
Brocade#ping ipv6 nyc01
Brocade#ping ipv6 nyc01.newyork.com
Defining an IPv6 DNS entry
IPv6 defines new DNS record types to resolve queries for domain names to IPv6 addresses, as well
as IPv6 addresses to domain names. Brocade devices running IPv6 software support AAAA DNS
records, which are defined in RFC 1886.
AAAA DNS records are analogous to the A DNS records used with IPv4. They store a complete IPv6
address in each record. AAAA records have a type value of 28.
To establish an IPv6 DNS entry for the device, enter the following command.
Brocade(config)#ipv6 dns domain-name companynet.com
Syntax: [no] ipv6 dns domain-name <domain name>
To define an IPv6 DNS server address, enter the following command.
Brocade(config)#ipv6 dns server-address 200::1
Syntax: [no] ipv6 dns server-address <ipv6-addr> [<ipv6-addr>] [<ipv6-addr>] [<ipv6-addr>]
As an example, in a configuration where ftp6.companynet.com is a server with an IPv6 protocol
stack, when a user pings ftp6.companynet.com, the Brocade device attempts to resolve the AAAA
DNS record. In addition, if the DNS server does not have an IPv6 address, as long as it is able to
resolve AAAA records, it can still respond to DNS queries.
Pinging an IPv6 address
NOTE
This section describes the IPv6 ping command. For details about IPv4 ping, refer to “Pinging an IPv4
address” on page 95.
The ping command allows you to verify the connectivity from a Brocade device to an IPv6 device by
performing an ICMP for IPv6 echo test.
For example, to ping a device with the IPv6 address of 2001:3424:847f:a385:34dd::45 from the
Brocade device, enter the following command.
Brocade#ping ipv6 2001:3424:847f:a385:34dd::45