158 BigIron RX Series Configuration Guide53-1001986-01Basic IP parameters and defaults7IP interface parametersTable 44 lists the interface-level IP parameters for the device, their default values, and where tofind configuration information.Static route An IP route you place in the IP route table. No entries page 197Source interface The IP address the router uses as the source address for Telnet,RADIUS, or TACACS and TACACS+ packets originated by the router.The router can select the source address based on either of thefollowing:• The lowest-numbered IP address on the interface the packetis sent on.• The lowest-numbered IP address on a specific interface. Theaddress is used as the source for all packets of the specifiedtype regardless of interface the packet is sent on.The lowest-numbered IPaddress on the interface thepacket is sent on.page 181TABLE 43 IP global parameters (Continued)Parameter Description Default See page...TABLE 44 IP interface parametersParameter Description Default See page...IP state The Internet Protocol, version 4 EnabledNOTE: You cannot disableIP.n/aIP address A Layer 3 network interface addressThe device has separate IP addresses on individual interfaces.None configured a page 159Encapsulation type The format of the packets in which the router encapsulates IPdatagrams. The encapsulation format can be one of the following:• Ethernet II• SNAPEthernet II page 177IP MaximumTransmission Unit(MTU)The maximum length (number of bytes) of an encapsulated IPdatagram the router can forward.1500 for Ethernet IIencapsulated packets1492 for SNAP encapsulatedpacketspage 179ARP age Locally overrides the global setting. Refer to Table 43 onpage 155.Ten minutes page 188Metric A numeric cost the router adds to RIP routes learned on theinterface. This parameter applies only to RIP routes.1 (one) page 662Directed broadcastforwardingLocally overrides the global setting. Refer to Table 43 onpage 155.Disabled page 193ICMP RouterDiscovery Protocol(IRDP)Locally overrides the global IRDP settings. Refer to Table 43 onpage 155.Disabled page 213ICMP RedirectmessagesLocally overrides the global setting. Refer to Table 43 onpage 155.Enabled page 196
