186 BigIron RX Series Configuration Guide53-1001810-01Configuring forwarding parameters7 Displaying the routes waiting for the next hop ARP to resolveUse the following command to display which routes are waiting for the nexthop ARP to be resolved.Displaying ARPWhen the next hop entry is a staic route, enter the following command to display the route and thetimer value.BigIron RX# show arp 10.43.14.1Total number of ARP entries: 1IP Address MAC Address Type Age Port Status1 10.43.14.1 00ab.cdef.0100 Dynamic 5 mgmt1 ValidARP Debug InfoArpIndex 0 InstId 16840 OutInt 2048 Vlan:0HwMacIndex 0x0000ffff Router 0 PktCount 0NumReq 0 ReplyTimeout 100For additional information on the command syntax, refer to the syntax of the show arp commandunder “Displaying the ARP cache” on page 217.Configuring forwarding parametersThe following configurable parameters control the forwarding behavior of the device:• Time-To-Live (TTL) threshold• Forwarding of directed broadcasts• Forwarding of source-routed packets• Ones-based and zero-based broadcastsAll these parameters are global and thus affect all IP interfaces configured on the device.To configure these parameters, use the procedures in the following sections.Changing the TTL thresholdThe TTL threshold prevents routing loops by specifying the maximum number of router hops an IPpacket originated by the device can travel through. Each device capable of forwarding IP thatreceives the packet decreases the packet’s TTL by one. If a device receives a packet with a TTL of 1and reduces the TTL to zero, the device drops the packet.The default TTL is 64. You can change the TTL to a value from 1– 255.BigIron RX# show ip static routeIP Static Routing Table - 2 entries:Type Codes: '*' - Installed, '+' - Waiting for ARP resolutionIP Prefix Next Hop Interface Dis/Metric/Tag*10.0.0.0/8 10.43.14.1 1/1/0+20.1.1.0/24 12.1.1.2 1/1/0*20.1.1.0/24 12.1.1.6 1/1/0+20.1.1.0/24 12.1.1.7 5/1/020.1.1.0/24 10.43.14.1 10/1/0
