RADIUS Attributes Reference
7750 SR RADIUS Attributes Reference Guide Page 67
Table 9: Wholesale-Retail: L2TP Tunneled Access Mode (limits) 
Attribute ID Attribute 
Name
Type Limits SR OS Format
64 Tunnel-Type integer 3 (mandatory 
value)
Mandatory 3=L2TP 
For example: Tunnel-Type = L2TP
65 Tunnel-
Medium-Type
integer 1 (mandatory 
value)
Mandatory 1=IP or IPv4
For example: Tunnel-Medium-Type = IP
66 Tunnel-Client-
Endpoint
string Max. length = 
15 bytes 
(untagged) or 
16 bytes 
(tagged)
<tag field><dotted-decimal IP address used on 
LAC as L2TP src-ip>
If the tag field is greater than 0x1F, it is interpreted 
as the first byte of the following string field
For example: 
# untagged Tunnel-Client-Endpoint = 
312e312e312e31
Tunnel-Client-Endpoint = 1.1.1.1
# tagged 0 Tunnel-Client-Endpoint = 
00312e312e312e31
Tunnel-Client-Endpoint:0 = 1.1.1.1
# tagged 1 Tunnel-Client-Endpoint = 
01312e312e312e31
Tunnel-Client-Endpoint:1 = 1.1.1.1
67 Tunnel-
Server-
Endpoint
string Max. length = 
15 bytes 
(untagged) or 
16 bytes 
(tagged)
Max. 451 
attributes or 
limited by 
Radius 
message size
<tag field><dotted-decimal IP address used on 
LAC as L2TP dst-ip>
If Tag field is greater than 0x1F, it is interpreted as 
the first byte of the following string field
For example: # tagged 1 Tunnel-Server-Endpoint = 
01332e332e332e33
Tunnel-Server-Endpoint:1 = 3.3.3.3
69 Tunnel-
Password
string 64 chars For example: Tunnel-Password:1 = password 
81 Tunnel-
Private-
Group-ID
string 32 chars For example: Tunnel-Private-Group-ID:1 = 
MyPrivateTunnelGroup