The use of the community approach is very effective. Providers want to map certaincommunity values to corresponding local preference values (that is, RFC 1998). The providerwill automatically assign customers routing updates tagged with a specific community to acorresponding local preference value.To keep this scenario manageable, only routing and policy setting from ISP1's point of vieware addressed. An identical discussion would apply to ISP2. Traffic flow for the caseillus..
Normal 0 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE ..
Integrated Services Digital Network (ISDN) is used by telephone companies to carry digitized voice and data over the existing telephone system. ISDN has emerged as one of the leading technologies for telecommuting and remote office connection into the corporate headquarters. On the seven layer model, ISDN operates at the physical, data link, and network layers. ISDN basic rate interface (BRI) provides two barrier channels (commonly referred as B channels). Each of these B ch..
Controlling Multicast Scope with Administratively Scoped Addressing
To configure regions of multicast scope using addressing rather than TTL, using the ip multicast boundary interface command: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#ip multicast-routing Router1(config)#access-list 15 deny 239.255.0.0 0.0.255.255 Router1(config)#access-list 15 permit any Router1(config)#interface FastEthernet0/0 Router1(config-if)#ip multicast boundary 15 Router1(config-if)#end Rout..
Configuring Frame Relay Traffic Shaping
This section discusses the IOS configuration commands for configuring Frame Relay Traffic Shaping on a Cisco router. NOTE For this discussion, IOS Release 12.2(1) was used on all routers in the lab to maintain a consistency of software versions. The same release was used in the case study scenarios at the end of this chapter. Before configuring Frame Relay Traffic Shaping on a Cisco router, you must enable Frame Relay encapsulation on the main interface. By default, config..
