| Displaying GSLB information | 1 |
TABLE 11 | GSLB zone and host application information |
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This field... | Displays... |
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ZONE | The zone name. The name that appears here is the name you specified | |
| when you configured the zone information. |
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| NOTE: This field appears only if you do not specify the zone name when | |
| you display the information. If you specify the zone name, |
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| information for only that zone is displayed. |
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HOST | The host name. The name that appears here is the name you specified | |
| when you configured the host information. |
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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 |
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| servers contain the content for www.brocade. |
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| After evaluating the addresses using the GSLB policy, the GSLB |
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| 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 |
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| “best” site. |
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| 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 “Enabling DNS override” on page 33. |
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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 “Enabling DNS override” on page 33.
• 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: |
| • |
| • |
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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. |
ServerIron ADX Global Server Load Balancing Guide | 171 |
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