1701. The show isis database Command

The show isis database command shows the LSPs held in the local database. The LSP ID shows the system ID of the generating router and whether this LSP is from a router or a pseudonode. The last octet shows whether the LSP was too large to fit into one PDU; a nonzero value in this field indicates tha...

Routing Policy and the BGP Decision Algorithm

A BGP router may receive paths for the same route from many neighbors. How the best path is selected is a matter of local policy. The policy within an AS must be consistent; otherwise, routing loops could occur. Conceptually, the policy and decision process is shown in Figure 11-16.   ...

Configuring CBWFQ for Frame Relay

This section discusses the configuration tasks for enabling CBWFQ on Frame Relay PVCs. CBWFQ is configured via the MQC configuration interface; MQC was explained at the beginning of this chapter. Table 18-1 lists the configuration options available for setting up the traffic classes. Table 18-2 disp...

Summarizing Outbound Routing Information

By default, BGP will try to summarize routes. This is not always desirable, though, which is why we have explicitly disabled this feature in many of the examples in this chapter. In fact, many engineers prefer to manually summarize their routing tables because they want to control what gets summariz...

IEEE 802.1Q Protocol

The IEEE 802.1Q protocol also can carry VLAN associations over trunk links. However, this frame-identification method is standardized, allowing VLAN trunks to exist and operate between equipment from multiple vendors. In particular, the IEEE 802.1Q standard defines an architecture for VLAN use, serv...

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