Setting Rip Routing; Setting The Dial Group; Setting The Mtu Size - Lucent Technologies PortMaster 4 Configuration Manual

Configuring the Location Table

Setting RIP Routing

You can associate RIP routing with locations—for example, a dial on-demand
connection where the remote router is defined as a location on the local PortMaster.
As described in the PortMaster Routing Guide, PortMaster products automatically send and
accept route information as RIP messages, unless configured otherwise.
Note – ComOS 4.1 and later releases support both RIP-1 and RIP-2 on the
PortMaster 4. Earlier releases of ComOS support only RIP-1.
Refer to the PortMaster Routing Guide for OSPF and BGP configuration instructions.
To set RIP routing for a location, use the following command:
Command> set location Locname rip on|off|broadcast|listen|v2
{broadcast|multicast|on|v1-compatibility}
Refer to the PortMaster 4 Command Line Reference for a description of the keywords in this
command. Refer to the PortMaster Routing Guide for a discussion of routing with RIP, and
for OSPF and BGP routing configuration instructions.

Setting the Dial Group

Dial groups associate locations with specific dial-out ports. By default, all ports and
locations belong to dial group 0 (zero). You can configure locations and ports into dial
groups numbered from 0 to 99. Dial group numbers can be used to reserve ports for
dial-out to specific locations, or to differentiate among different types of modems that
are compatible with the remote location.
The dial group associated with a location works with the dial group specified for each
port. For example, you create a dial-out location called home and specify that the dial
group for home is 2. When you configure each port, you can assign the port to a dial
group. Only ports assigned to group 2 are used to dial the location home, while other
ports are not.
To associate a location with a dial group number, use the following command:
Command> set location Locname group Group

Setting the MTU Size

The maximum transmission unit (MTU) defines the largest frame or packet that can be
sent through this port, without fragmentation. If an IP packet exceeds the specified
MTU, it is automatically fragmented. An IPX packet that exceeds the specified MTU is
automatically dropped. PPP connections can have a maximum MTU of 1500 bytes. SLIP
connections can have a maximum MTU of 1006 bytes. With PPP, the PortMaster can
negotiate smaller MTUs when requested during PPP negotiation.
The MTU is typically set to the maximum allowed for the protocol being used. However,
smaller MTU values can improve performance for interactive sessions. During PPP
negotiation, the smaller number is used. If you are using IPX, the MTU must be set to at
least 600.
7-6 PortMaster 4 Configuration Guide