To view the contents of the CAM table, you can use the following form of the show mac address-table EXEC command: Switch# show mac address-table dynamic [address mac-address | interface type mod/num | vlan vlan-id] The entries that have been learned dynamically will be shown. You can add the address keyword to specify a single MAC address, or the interface or vlan keyword to see addresses that have been learned on a specific interface or VLAN. For example..
Route Map set Commands for Route Redistribution
When used for redistribution, route maps have an implied action—either to allow the route to be redistributed or to filter the route so that it is not redistributed. As described earlier in this chapter, that choice is implied by the permit or deny option on the route-map command. Route maps can also change information about the redistributed routes by using the set command. Table 11-3 lists the set command options when used for IGP route redistribution. Table 11-3 set Com..
Summarization hides details in order to simplify the routing process. One of the keys to scalable routing is to take large complicated sets of advertisements and reduce them as much as possible. Summarization reduces router resource consumption (CPU and memory) required to store and process routes by reducing the number of routes. Summarization also saves network capacity, because fewer advertisements are required and each advertisement is smaller. Summarization also hi..
Recall that the traditional STP offers the PortFast feature, in which switch ports are allowed to immediately enter the Forwarding state as soon as the link comes up. Normally, PortFast provides quick network access to end-user devices, where bridging loops never are expected to form. Even while PortFast is enabled on a port, STP still is running and can detect a bridging loop. However, a loop can be detected only in a finite amount of time— the length of time require..
There are several OSPF debugging options. But usually, if there is an OSPF problem, you will see it as instabilities in the neighbor relationships. So the most useful debugging option traces the formation of adjacencies. Router3#debug ip ospf adj OSPF adjacency events debugging is on Router3# This particular debug output is particularly useful because it helps to diagnose problems when routers fail to form adjacencies with one another. For example, the following debug mess..
