SMC Networks SMC8748ML3 Management Manual page 382

Gigabit ethernet switch

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Table of Contents

ONFIGURING THE

- Routes are subsequently assigned a metric equal to the sum of all

metrics for each interface link in the route.

• Authentication Type – Specifies the authentication type used for an

interface. (Options: None, Simple password, MD5; Default: None)

- Use authentication to prevent routers from inadvertently joining an

unauthorized area. Configure routers in the same area with the same

password or key.

- When using simple password authentication, a password is included

in the packet. If it does not match the password configured on the

receiving router, the packet is discarded. This method provides very

little security as it is possible to learn the authentication key by

snooping on routing protocol packets.

- When using Message-Digest 5 (MD5) authentication, the router uses

the MD5 algorithm to verify data integrity by creating a 128-bit

message digest from the authentication key. Without the proper key

and key-id, it is nearly impossible to produce any message that

matches the prespecified target message digest.

- The Authentication Key and Message Digest Key-id must be used

consistently throughout the autonomous system. (Note that the

Message Digest Key-id field is disabled when this authentication type

is selected.)

• Authentication Key – Assign a plain-text password used by neighboring

routers to verify the authenticity of routing protocol messages.

(Range: 1-8 characters for simple password or 1-16 characters for MD5

authentication; Default: no key)

- You can assign a unique password to each network (i.e., autonomous

system) to improve the security of the routing database. However, the

password must be used consistently on all neighboring routers

throughout a network.

• Message Digest Key-id – Assigns a key-id used in conjunction with the

authentication key to verify the authenticity of routing protocol messages

sent to neighboring routers. (Range: 1-255; Default: none)

- Normally, only one key is used per interface to generate

authentication information for outbound packets and to authenticate