Brocade Communications Systems 12.4.00 Manual De Usuario

Displaying GSLB information

1

TABLE 11

GSLB zone and host application information 

This field...

Displays...

ZONE

The zone name. The name that appears here is the name you specified 
when you configured the zone information.
NOTE: This field appears only if you do not specify the zone name when 

you display the information. If you specify the zone name, 
information for only that zone is displayed.

HOST

The host name. The name that appears here is the name you specified 
when you configured the host information.

IP addresses

The column of IP addresses lists the IP addresses the authoritative DNS 
server associated with the host name in the DNS reply. These are the 
servers that contain the content for the host. In this example, the 
servers contain the content for www.brocade.
After evaluating the addresses using the GSLB policy, the GSLB 
ServerIron ADX marks each address that passes the algorithm with an 
asterisk (*). An IP address that does not have an asterisk in front of it 
has not passed the GSLB algorithm and cannot be selected as the 
“best” site. 
NOTE: If DNS override is enabled, only the addresses configured in the 

host’s IP list have asterisks and are valid choices for the best 
site. Refer to 

Source

The value following each server IP address indicates how the ServerIron 
ADX learned the address. This field can have one of the following values:

•

cfg: The address is one that you associated with the host as part of 
the DNS override feature. Refer to 

•

d/c: The address was learned from the DNS server and also is one 
that you associated with the host.

•

dns: The address was learned from the DNS server.

In the example above, the ServerIron ADX learned about all the IP 
addresses associated with the zone name from the DNS server; thus, 
the source is listed as “dns”.

Type

The next value indicates the type of address, which can be one of the 
following:

•

v-ip: The address is a VIP configured on a ServerIron ADX.

•

real-ip: The address is a real server.

State

The state of the server. The ServerIron ADX determines the state based 
on the results of the Layer 7 health checks sent to the server. The 
ServerIron ADX sends Layer 7 health checks for each host application 
you associate with the zone. 
The state can be one of the following:

•

ACTIVE: The server passed the Layer 4 and Layer 7 health checks 
and is presumed to be available.

•

DOWN: The server failed a health check. If any of the health checks 
are failed, the GSLB ServerIron ADX disqualifies this site from being 
the “best” site. 

NOTE: If the server has multiple applications, all the applications must 

pass the health check.

NOTE: The ServerIron ADX also uses the results of the health check, if 

the server passes the check, in the TCP and App columns under 
FlashBack Delay, described below.