VPRN Services
7705 SAR OS Services Guide Page 471
keep — the existing information is kept in the packet and the router does not add any additional
information. In the downstream direction, the Option 82 field is not stripped and is sent on
towards the client.
The behavior is slightly different in the case of Vendor Specific Options (VSOs). When the keep
parameter is specified, the router will insert its own VSO into the Option 82 field. This will only
be done when the incoming message has an Option 82 field already.
If no Option 82 field is present, the router will not create the Option 82 field. In this case, no VSO
will be added to the message.
circuit-id
Syntax circuit-id [ascii-tuple | ifindex | sap-id | vlan-ascii-tuple]
no circuit-id
Context config>service>vprn>if>dhcp>option
Description This command sends either an ASCII tuple or the interface index (If Index) on the specified SAP ID
in the circuit-id suboption of the DHCP packet. The If Index of a router interface can be displayed
using the command show>router>interface> detail. This option specifies data that must be unique
to the router that is relaying the circuit.
If disabled, the circuit-id suboption of the DHCP packet is left empty.
The no form of this command returns the system to the default.
Default ascii-tuple
Parameters ascii-tuple — the ASCII-encoded concatenated “tuple” will be used, where the “tuple” consists of the
access-node-identifier, service-id, and interface-name, separated by the syntax symbol “|”
ifindex — the interface index will be used
sap-id — the SAP ID will be used
vlan-ascii-tuple — specifies that the format will include VLAN-id and dot1p bits, in addition to the
ascii-tuple. The format is supported on dot1q ports only. Thus, when the Option 82 bits are
stripped, dot1p bits will be copied to the Ethernet header of an outgoing packet.
remote-id
Syntax remote-id [mac | string string]
no remote-id
Context config>service>vprn>if>dhcp>option
Description This command sends the MAC address of the remote end (typically, the DHCP client) in the remote-
id suboption of the DHCP packet. This command identifies the host at the other end of the circuit. If
disabled, the remote-id suboption of the DHCP packet will be left empty.
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