Chapter 16: Dynamic Routing Protocols
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Single or Multiple Keys
For RIP with MD5 to interoperate with other routers, the external router must be set up to send and receive either using
one key or multiple keys.
Single Key Authentication
For single key MD5 authentication, the system administrator can define a single key for a specified physical interface. This
interface uses an infinite send and receive lifetime key and, therefore, never ages out.
In this configuration, the key ID associated with the key must be set to 0 on all peer routers. If a router receives a RIP
message with a non-matching key, it identifies the authentication mismatch and drops the message.
Enable Single Key Authentication
Use the following procedure to configure single key MD5 authentication.
To Enable Single Key Authentication
1.
Set the single key authentication node on the physical interface:
configure interface {cable-mac <mac> | gigabitethernet <slot>/<port> | tengigabitethernet
<slot>/<port>} ip rip authentication mode md5
Where:
cable-mac <mac>
is the MAC identifier
gigabitethernet <slot>/<port> |
tengigabitethernet <slot>/<port>
is the RCM slot number/port number of the specified
interface
The system will respond:
Authentication mode is keyed MD5 digest
2.
Create the MD5 key:
configure interface {cable-mac <mac> | gigabitethernet <slot> | tengigabitethernet <slot>} ip rip
authentication key <key>
Where:
<key>
is a text string 1–16 characters long used for the key id.