HP 8/8 Fabric OS Administrator's Guide v6.4.0 (53-1001763-01, June 2010) - Page 68
Domain IDs, Synchronizing the local time with an external source
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2 Domain IDs In a Virtual Fabric, all the switches in the fabric must have the same NTP clock server configured. This includes any pre-Fabric OS v6.2.0 switches in the fabric. This ensures that time does not go out of sync in the logical fabric. It is not recommended to have LOCL in the server list. When a new switch enters the fabric, the time server daemon of the principal or primary FCS switch sends out the addresses of all existing clock servers and the time to the new switch. When a switch with Fabric OS v6.1.0 or later enters the fabric, it stores the list and the active servers. NOTE In a Virtual Fabric, multiple logical switches can share a single chassis. Therefore, the NTP server list must be the same across all fabrics. Synchronizing the local time with an external source The tsClockServer command accepts multiple server addresses in IPv4, IPv6, or DNS name formats. When multiple NTP server addresses are passed, tsClockServer sets the first obtainable address as the active NTP server. The rest are stored as backup servers that can take over if the active NTP server fails. The principal or primary FCS switch synchronizes its time with the NTP server every 64 seconds. 1. Connect to the switch and log in using an account assigned to the admin role. 2. Enter the tsClockServer command: switch:admin> tsclockserver "" In this syntax, ntp1 is the IP address or DNS name of the first NTP server, which the switch must be able to access. The second variable, ntp2, is the second NTP server and is optional. The operand "" is optional; by default, this value is LOCL, which uses the local clock of the principal or primary switch as the clock server. Example of setting the NTP server switch:admin> tsclockserver LOCL switch:admin> tsclockserver "10.1.2.3" Example of displaying the NTP server switch:admin> tsclockserver 10.1.2.3 Example of setting up more than one NTP server using a DNS name switch:admin> tsclockserver "10.1.2.4;10.1.2.5;ntp.localdomain.net" Updating Clock Server configuration...done. Updated with the NTP servers Changes to the clock server value on the principal or primary FCS switch are propagated to all switches in the fabric. Domain IDs Although domain IDs are assigned dynamically when a switch is enabled, you can change them manually so that you can control the ID number or resolve a domain ID conflict when you merge fabrics. 28 Fabric OS Administrator's Guide 53-1001763-01
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