Monitoring And Maintaining Ip Addressing - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 31 Configuring IP Unicast Routing
Beginning in privileged EXEC mode, follow these steps to increase spanning-tree-based flooding:
Command
Step 1
configure terminal
Step 2
ip forward-protocol turbo-flood
Step 3
end
Step 4 show running-config
Step 5
copy running-config startup-config
To disable this feature, use the no ip forward-protocol turbo-flood global configuration command.

Monitoring and Maintaining IP Addressing

When the contents of a particular cache, table, or database have become or are suspected to be invalid,
you can remove all its contents by using the clear privileged EXEC commands.
commands for clearing contents.
Table 31-3 Commands to Clear Caches, Tables, and Databases
Command
clear arp-cache
clear host {name | *}
clear ip route {network [mask] |*}
You can display specific statistics, such as the contents of IP routing tables, caches, and databases; the
reachability of nodes; and the routing path that packets are taking through the network.
the privileged EXEC commands for displaying IP statistics.
Table 31-4 Commands to Display Caches, Tables, and Databases
Command
show arp
show hosts
show ip aliases
show ip arp
show ip interface [interface-id]
show ip irdp
show ip masks address
show ip redirects
show ip route [address [mask]] | [protocol]
show ip route summary
78-11194-09
Purpose
Enter global configuration mode
Use the spanning-tree database to speed up flooding of UDP datagrams.
Return to privileged EXEC mode.
Verify your entry.
(Optional) Save your entry in the configuration file.
Purpose
Clear the IP ARP cache and the fast-switching cache.
Remove one or all entries from the host name and the address cache.
Remove one or more routes from the IP routing table.
Purpose
Display the entries in the ARP table.
Display the default domain name, style of lookup service, name server hosts,
and the cached list of host names and addresses.
Display IP addresses mapped to TCP ports (aliases).
Display the IP ARP cache.
Display the IP status of interfaces.
Display IRDP values.
Display the masks used for network addresses and the number of subnets
using each mask.
Display the address of a default gateway.
Display the current state of the routing table.
Display the current state of the routing table in summary form.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring IP Addressing on Layer 3 Interfaces
Table 31-3
Table 31-4
lists the
lists
31-17