Chapter 28
| Domain Name Service Commands
– 880 –
show dns cache This command displays entries in the DNS cache.
Command Mode
Privileged Exec
Example
Console#show dns cache
No. Flag Type IP Address TTL Host
------- ------- ------- --------------- ------- --------
3 4 Host 209.131.36.158 115 www-real.wa1.b.yahoo.com
4 4 CNAME POINTER TO:3 115 www.yahoo.com
5 4 CNAME POINTER TO:3 115 www.wa1.b.yahoo.com
Console#
show hosts This command displays the static host name-to-address mapping table.
Command Mode
Privileged Exec
Example
Note that a host name will be displayed as an alias if it is mapped to the same
address(es) as a previously configured entry.
Console#show hosts
No. Flag Type IP Address TTL Host
---- ---- ------- -------------------- ----- -------------------------------
0 2 Address 192.168.1.55 rd5
1 2 Address 2001:DB8:1::12 rd6
3 4 Address 209.131.36.158 65 www-real.wa1.b.yahoo.com
4 4 CNAME POINTER TO:3 65 www.yahoo.com
5 4 CNAME POINTER TO:3 65 www.wa1.b.yahoo.com
Console#
Table 172: show dns cache - display description
Field Description
No. The entry number for each resource record.
Flag The flag is always “4” indicating a cache entry and therefore unreliable.
Type This field includes “Host” which specifies the primary name for the owner, and
“CNAME” which specifies multiple domain names (or aliases) which are
mapped to the same IP address as an existing entry.
IP Address The IP address associated with this record.
TTL The time to live reported by the name server.
Host The host name associated with this record.
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