3com S7906E Manuel De Montage

 

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Sub-option 1: IP address of the primary network calling processor, which is a server serving as the 

network calling control source and providing program downloads. 

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Sub-option 2: IP address of the backup network calling processor that DHCP clients will contact 

when the primary one is unreachable. 

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Sub-option 3: Voice VLAN ID and the result whether DHCP clients take this ID as the voice VLAN 

or not. 

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Sub-option 4: Failover route that specifies the destination IP address and the called number (SIP 

users use such IP addresses and numbers to communicate with each other) that a SIP user uses 

to reach another SIP user when both the primary and backup calling processors are unreachable. 

 

You must define the sub-option 1 to make other sub-options effective. 

 

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RFC 2131: Dynamic Host Configuration Protocol 

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RFC 2132: DHCP Options and BOOTP Vendor Extensions 

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RFC 1542: Clarifications and Extensions for the Bootstrap Protocol 

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RFC 3046: DHCP Relay Agent Information Option