- Enterasys Security Router User's Guide

Configuring the LAN
3-2 Managing LAN/WAN Interfaces
• Maximum Transmission Unit (MTU) - all frames less than or equal to 1518 bytes are accepted.
MTU size is set using the
ip mtu command.
• Speed is enabled using the
speed command with the following options:
– 10 - 10 Mbps
– 100 - 100 Mbps
– 1000 - 1000 Mbps
– Auto - Auto-negotiate (default)
• Statistics - all MIB-II interface statistics are supported
• Clear commands such as
clear counters FastEthernet and clear counters
gigabitethernet
, which reset the MIB-II counters, and clear interface FastEthernet
and clear interface GigabitEthernet, which reset the interface counters and facilitate
interface troubleshooting.
Configuring the LAN
Enter the following commands to configure FastEthernet interface 1 on network 192.57.99.32:
XSR(config)#interface fastethernet 1
XSR(config-if<F1>)#ip address 192.57.99.32 255.255.255.0
XSR(config-if<F1>)#no shutdown
Enter the following commands to configure GigabitEthernet interface 2 on network 192.168.57.12:
XSR(config)#interface gigabitethernet 2
XSR(config-if<G2>)#ip address 192.168.57.12 255.255.255.0
XSR(config-if<G2>)#no shutdown
MIB Statistics
The following table reflects MIB-II (RFC-1213) port statistics collected by a LAN interface.
Table 3-1 MIB-II Interface Statistics
Variable Description
IfDescr Description of the interface.
IfType Type of the interface (set once, and never changed).
IfMtu Size of the largest packet that can be sent/received on the interface, specified in bytes.
IfSpeed Estimate of the interface's current bandwidth in kilobits per second (10000 or 100000)
IfPhysAddress Interface's address at its protocol sub-layer (the MAC address).
ifAdminStatus Desired state for the interface.
ifOperStatus Current operational status of the interface.
ifLastChange Value of sysUpTime when the interface entered its current operational state.
IfInOctets Sum of octets received on the interface.
ifInUcastPkts Sum of subnetwork-unicast packets delivered to a higher layer protocol.