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ManualsBrandsHP ManualsNetwork HardwareHP 5412R-92G-PoE+/2SFP+ (No PSU) v2 zl2 Switch

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Example 63 IP route summary display

HP Switch(config)# show ip route summary

IPv4 Route Table Summary

Protocol Active Routes

--------- -------------

Connected 1

Static 1

To configure a static IP route, see “Static Routing” (page 122).

IP forwarding cache

The IP forwarding cache provides a fast-path mechanism for forwarding IP packets. The cache

contains entries for IP destinations. When an HP routing switch has completed processing and

addressing for a packet and is ready to forward the packet, the device checks the IP forwarding

cache for an entry to the packet's destination.

• If the cache contains an entry with the destination IP address, the device uses the information

in the entry to forward the packet out the ports listed in the entry. The destination IP address

is the address of the packet's final destination. The port numbers are the ports through which

the destination can be reached.

• If the cache does not contain an entry, the software can create an entry in the forwarding

cache.

Each entry in the IP forwarding cache has an age timer. The age interval depends on the number

of entries in the table. The age timer ranges from 12 seconds (full table) to 36 seconds (empty

table.) Entries are aged only if they are not being used by traffic. If you have an entry that is always

being used in hardware, it will never age. If there is no traffic, it will age in 12 to 36 seconds.

The age timer is not configurable.

NOTE: You cannot add static entries to the IP forwarding cache.

IP route exchange protocols

The switch supports the following IP route exchange protocols:

• Routing Information Protocol (RIP)

• Open Shortest Path First (OSPF)

• ICMP Router Discovery Protocol (IRDP)

• Dynamic Host Configuration Protocol (DHCP) Relay

These protocols provide routes to the IP route table. You can use one or more of these protocols,

in any combination. The protocols are disabled by default. For configuration information, see the

following:

• “Configuring RIP parameters” (page 129)

• “Configuring OSPF on the routing switch” (page 140)

• “Configuring IRDP” (page 225)"

• “Dynamic Host Configuration Protocol” (page 228)"

IP global parameters for routing switches

Table 8 (page 115) lists the IP global parameters and the page where you can find more information

about each parameter.

114 Routing Basics