Option 82 - Juniper JUNOSE SOFTWARE 11.2.X - BROADBAND ACCESS CONFIGURATION GUIDE 7-20-2010 Configuration Manual

Table 102: Effect of Commands on Option 82 Suboption
Settings (continued)
Command
no set dhcp relay agent sub-option remote-id
no set dhcp relay agent sub-option vendor-specific suboption-type
set dhcp relay agent
set dhcp relay agent circuit-id-only
set dhcp relay agent remote-id-only
no set dhcp relay agent
Copyright © 2010, Juniper Networks, Inc.
Format of the JunosE Data Field in the Vendor-Specific Suboption for Option 82
RFC 4243 describes support for data fields from multiple vendors in the Vendor-Specific
suboption for option 82. The JunosE Software DHCP relay agent, however, supports only
the JunosE Software data field.
RFC 4243 supports the following format of the Vendor-Specific suboption:
0
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Code (9) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
\
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
.
.
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The JunosE Software data field appears after the JunosE Software enterprise number
and data length fields in the Vendor-Specific suboption. The format of the JunosE data
field is a sequence of type/length/value (TLV) tuples. The type field and length field (the
length of the following value field) are each 1 byte in size. The JunosE data length field
specifies the total length of all TLV tuples. The JunosE Software enterprise number is
4874 (0x130a.)
The format of the Layer 2 Circuit ID type field (type 1) is hexadecimal. The data field
length of a normal non-stacked VLAN is 2 bytes, with the VLAN ID occupying the 12
low-order bits of the value; the 4 high-order bits are 0. The data field length of a stacked
VLAN is 4 bytes, with the SVLAN ID occupying the 12 low-order bits of the 2 high-order
Suboption and Status
Agent Remote
Agent Circuit ID ID
No change Disable
No change No change
Enable Enable
Enable Disable
Disable Enable
Disable Disable
1 2
Length | Enterprise Number 1
| DataLen 1
Suboption Data 1
Chapter 20: Configuring DHCP Relay
Vendor-Specific
No change
Disable specified
suboption type
Not supported
Not supported
Not supported
Disable
3
|
| |
+
\
.
.
497