Manual

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of resolved by switch.
show dns config
Display the configured global DNS information
on the switch.
show dns client
Display the DNS Client information maintained
by the switch.
debug dns {all | packet [send | recv] |
events | relay}
no debug dns {all | packet [send | recv] |
events | relay}
To enable/disable DEBUG of DNS function.
41.3 Typical Examples of DNS
DNS CLIENT typical environment
As shown in fig, the switch connected to DNS server through network, if the switch want to visit
yandex website, it needn’t to know the IPv4/IPv6 address of yandex website, only need is to
record the domain name www.yandex.ru. The DNS server can resolute out the IPv4/IPv6
address of this domain name and send to switch, then the switch can visit www.yandex.ru
correctly. The switch is configured as DNS client, basic configurations are as below: first to
enable DNS dynamic domain name resolution function on switch, and configure DNS server
address, then with some kinds of tools such as PING, the switch can get corresponding
IPv4/IPv6 address with dynamic domain name resolution function.
DNS SERVER
IP: 87.250.250.3
IPv6: 2001::1
ip domain-lookup
dns-server 87.250.250.3
dns-server 2001::1
switch
INTERNE
T
DNS SERVER
IP:87.250.250.3
IPv6:2001::1
INTERNET
switch
client