3Com 5500-EI PWR Install Manual page 283

Some fields in a RIP-1 packet must be 0, and they are known as must be zero field. For RIP-1, the
must be zero field is checked for incoming packets, and those RIP-1 packets with this field being
nonzero will not be processed.
Setting RIP-2 packet authentication mode
RIP-2 supports two authentication modes: simple authentication and message digest 5 (MD5)
authentication.
Simple authentication cannot provide complete security, because the authentication keys sent along
with packets that are not encrypted. Therefore, simple authentication cannot be applied where high
security is required.
Follow these steps to set RIP-2 packet authentication mode:
To do...
Enter system view
Enter interface
view
Set RIP-2 packet
authentication
mode
Configuring RIP to unicast RIP packets
Follow these steps to configure RIP to unicast RIP packets:
To do...
Enter system view
Enter RIP view
Configure RIP to
unicast RIP packets
Use the command...
system-view
interface interface-type
interface-number
rip authentication-mode
{ simple password | md5
{ rfc2082 key-string key-id |
rfc2453 key-string } }
Use the command...
system-view
rip
peer ip-address
—
—
Required
If you specify to use MD5 authentication, you
must specify one of the following MD5
authentication types:
rfc2453 (this type supports the packet format
defined in RFC 2453)
rfc2082 (this type supports the packet format
defined in RFC 2082)
—
—
Required
When RIP runs on the link that does not support
broadcast or multicast, you must configure RIP to
unicast RIP packets.
3-10
Remarks
Remarks