Segmenting the AS with Multiple Regions Separated by EBGP
If flexible policies are required between regions to direct traffic accordingly, for instance, each region can be represented as a separate autonomous system. EBGP operates between ASs, and IBGP is run within each AS. You can use a separate IGP if there is an additional requirement for a dynamic routing protocol to establish reachability between EBGP peers. Figure 9-15 illustrates this AS segmentation method. Figure 9-15. Multiple Regions Separated by EBGP At first gl..
Configuring OSPF with the Broadcast Network Type
With the broadcast OSPF network type, neighbors are automatically discovered and the hello timer is faster than with NBMA. Configuring a broadcast interface just involves changing the OSPF network type—no neighbor statements are required. The broadcast OSPF network type works best with a fully meshed network. Example 6-3 shows a typical configuration of the broadcast OPSF network type. Example 6-3. Configuring a Broadcast Network
IPv6 addresses have eight quartets of hex digits, separated by colons. Each quartet consists of four hex digits, which together represent 16 bits. The rules for encoding the actual hex values are as follows: ■ Each quartet is separated by a colon (:). ■ In a quartet, leading hex 0s can optionally be omitted. ■ If one or more consecutive quartets are hex 0000, then the set of consecutive all-0 quartets can be represented as a null quartet (::), no matter how many cons..
Class-Based WFQ and Low-Latency Queuing
Cisco created CBWFQ and LLQ using some of the best concepts from PQ, CQ, and WFQ, while adding several additional features. CBWFQ reserves bandwidth for each queue, and provides the ability to use WFQ concepts for packets in the default (class-default) queue. LLQ adds to CBWFQ the concept of a priority queue, but unlike PQ, LLQ prevents the high-priority queue from starving other queues. Additionally, both CBWFQ and LLQ use MQC for configuration, which means that the..
Configuring Cisco IOS MLP LFI for Frame Relay on a Cisco Router
This section describes the configuration tasks involved in setting up the LFI feature for Frame Relay virtual circuits on a Cisco router. Note that the Cisco IOS software supports LFI via MLP, LFI via MLP over Frame Relay, and LFI via MLP over ATM. In this section, only the configuration tasks concerning LFI via MLP over Frame Relay virtual circuits are discussed. NOTE The Cisco IOS MLP LFI feature for Frame Relay and ATM virtual circuits is released in Cisco IOS Release 12..
