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418 CHAPTER 28: CONFIGURING RIP
By default, the router is enabled to receive the host routes.
Enabling Route
Summarization for RIP
Version 2
Route summarization summarizes the routes of different subnets within the same
natural network segment and sends the summary to other network segments as a
summarized route with a natural mask. Route summarization largely reduces the
network expenditure and the routing table size.
RIP-1 always sends routes with natural mask. RIP-2 supports sub-net mask and
routs of unknown category. If the sub-net route needs to be broadcast, RIP-2 route
summary function can be disabled.
Perform the following configurations in RIP view.
Table 476 Enable Route Summarization
By default, RIP-2 automatic route summarization is enabled.
Configuring RIP-2 Packet
Authentication on the
Interface
Authentication for packets is not supported by RIP Version 1. But RIP Version 2
supports authentication.
RIP Version 2 supports authentication in two modes: simple text authentication
and MD5 authentication. Security is not ensured in simple text authentication.
Simple text means that the unencrypted authentication is transmitted with the
packets, therefore simple text authentication does not apply to a situation that
requires a high level of security. MD5 authentication has two message formats, in
compliance of the requirements of RFC1723 (RIP Version 2 Carrying Additional
Information) and RFC2082 (RIP Version 2 MD5 Authentication).
3Com routers support both formats.
Perform the following configurations in interface view.
Table 477 Configure Authentication for RIP Version 2
By default, RIP Version 2 packets are not authenticated on an interface. If MD5
authentication type is not specified, the nonstandard authentication type is used
by the router.
Disable receiving host routes undo host-route
Enable receiving host routes host-route
Operation Command
Enable automatic route summarization summary
Disable the automatic summarization
function of RIP-2
undo summary
Operation Command
Specify a password for RIP Version 2
simple text authentication
rip authentication-mode simple
password
Specify a key-string for RIP Version 2 MD5
authentication
rip authentication-mode md5
key-string string
Set the packet format type of RIP-2 MD5
authentication
rip authentication-mode md5 type [
nonstandard | usual ]
Cancel authentication for RIP Version 2 undo rip authentication-mode