Configuring the Ethernet Interface        4

This chapter discusses the following topics:

•  "General Ethernet Settings" on page 4-1

•  "Ethernet IP Settings" on page 4-3

•  "Ethernet IPX Settings" on page 4-5

•  "Setting OSPF" on page 4-7

  This chapter assumes you have already made the appropriate Ethernet connection for your needs. Refer to the relevant installation guide for your PortMaster product for information on making the Ethernet connection.

  See the Command Line Administrator's Guide for more detailed command descriptions and instructions.

General Ethernet Settings

This subsection describes the general Ethernet settings that apply to your network regardless of the protocol you use.

Configuring RIP Routing

To configure RIP routing, use the following command:

Command> set Ether0 rip on|broadcast|listen|off

Note ¯ ComOS releases prior to 3.5 use the keyword routing instead of the rip keyword.

 Table 4-1 describes the results of using each keyword.

  Table 4-1 Keywords for Configuring RIP Routing

Keyword	Description
on	The PortMaster broadcasts and listens for RIP information from other routers on the local Ethernet. This is the default.
off	The PortMaster neither broadcasts nor listens for RIP information from the local Ethernet.
broadcast	The PortMaster broadcasts RIP information to the local Ethernet.
listen	The PortMaster listens for RIP information from the local Ethernet.

See the PortMaster Routing Guide for instructions on configuring OSPF routing or configuring BGP routing.

Applying Filters

Filters applied to the Ethernet interface take effect immediately. If you change the filter, the change will not take effect until you set the filter on the interface again or you reboot the PortMaster.

Input Filters

To apply an input filter to the Ethernet interface, use the following command:

Command> set Ether0 ifilter Filtername

To remove the input filter, omit the filter name when entering the command.

Output Filters

Note ¯ ICMP and UDP packets generated by the PortMaster are never blocked by the output filter.

To apply an output filter to the Ethernet interface, use the following command:

Command> set Ether0 ofilter Filtername

To remove the output filter, omit the filter name when entering the command.

Ethernet IP Settings

This section describes the IP commands, keywords, and values that must be entered if you select IP protocol support.

Setting the IP Address

To later change the IP address of the Ethernet interface, use the following command:

Command> set Ether0 address Ipaddress

Note ¯ If you change the IP address of the Ethernet interface, you must reboot the PortMaster for the change to take effect.

Setting the Subnet Mask

To set the subnet mask, use the following command:

Command> set Ether0 netmask Ipmask

See Appendix A, "Networking Concepts," for more information about using subnet masks.

Setting the Broadcast Address

The broadcast address you set for the Ethernet interface on the PortMaster must match the broadcast address set for other hosts on your local Ethernet segment.

To set the broadcast address, use the following command:

Command> set Ether0 broadcast high|low

Enabling or Disabling IP Traffic

To enable or disable IP traffic, use the following command:

Command> set ether0 ip enable|disable

Note ¯ This command is currently available only on the Ether0 port.

Ethernet IPX Settings

• Network address

• Protocol

• Frame type

Setting the IPX Network Address

To set the IPX network address, use the following command:

Command> set Ether0 ipxnet Ipxnetwork

Note ¯ If you change the IPX network address of the Ethernet interface, you must reboot the PortMaster for the change to take effect.

Enabling or Disabling IPX Traffic

To enable or disable IPX traffic, use the following command:

Command> set ether0 ipx enable|disable

Note ¯ This command is available only on the Ether0 port.

Setting the IPX Frame Type

The encapsulation method and frame type were selected when your IPX network servers were installed. The IPX frame type you set on the PortMaster must match the frame type set for your network. Contact your IPX network administrator for information about the frame type used on your network.

To set the IPX frame type, use the following command-entered on one line:

Command> set Ether0 ipxframe ethernet_802.2|ethernet_802.2_ii|ethernet_802.3|ethernet_ii

Setting OSPF

To set OSPF on the interface, use the following command-entered all on one line:

Command> set Ether0 ospf on|off [cost Number] [hello-interval Seconds] [dead-time Seconds]

The on keyword enables OSPF on the specified Ethernet interface; off disables OSPF on that interface.

You can specify the cost of sending a packet on the interface with a link state metric by using the cost Number keyword and value. The Number metric is a 16-bit number between 1 and 65535; the default is 1.

Routers in OSPF networks continually exchange hello packets with their neighbor routers. You can set the interval that elapses between the transmission of hello packets on the interface by using the hello-interval Seconds keyword and value. Seconds can range from 10 to 120 seconds; the default is 10 seconds.

If the PortMaster stops receiving hello packets from a neighbor, it treats that router as inactive, or down. You can specify how long the PortMaster waits for hello packets from neighbors by using the dead-time Seconds keyword and value. Seconds can range from 40 to 1200 seconds; the default is 40 seconds.

Note ¯ You must set the same cost value, the same hello-interval value, and the same dead-time value on all routers attached to a common network.

See the PortMaster Routing Guide for more information on OSPF.