Abilene[] is another project of UCAID. It's complementary to Internet2 in the sense that the main goal of Abilene is to provide a primary backbone network for the Internet2 project. UCAID, in partnership with Qwest Communications, Nortel Networks, and Cisco Systems, has developed the Abilene network. Abilene provides the high-performance interconnect services among the Internet2 regional aggregation points. The primarily OC48c (2.5 Gbps) POS (Packet Over SONET) Abilene netw..
Interdomain Multicast: MSDP and MBGP
How do RPs learn about sources in other PIM domains? This problem is solved by the Multicast Source Discovery Protocol (MSDP). At the time of this writing, MSDP was still an Internet draft, and therefore this section describes only a work-in-progress. MSDP uses simple, one-to-one, BGP-like peering sessions to establish communication between RPs. Unlike BGP, however, no connection collision mechanism exists. Instead, the peer with the higher address listens on TCP port..
This section provides an overview of RSVP and its enhancements to support MPLS-TE applications. In the remainder of this chapter, the directional terms such as downstream, upstream, previous hop, and next hop are defined with respect to the direction of data packet flow. Originally, RSVP was designed as a protocol to install resource reservation states for individual data flows along a destination-based routed path (that is, along an IGP path).[1][2] An RSVP session is defin..
To configure DLSw to follow the SNA or APPN priorities defined in the traffic flow, you must configure the peer relationship to allow multiple distinct data streams: Router-A#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router-A(config)#dlsw remote-peer 0 tcp 10.1.1.5 lsap-output-list 200 priority Router-A(config)#end Router-A# You can then go further and map the individual priority streams to specific IP Precedence values, as in the ..
Many router commands will accept a hostname in place of an IP address. This helps make the configuration files more readable because it is much easier for humans to work with device names than IP addresses. However, the router still needs to have a way of translating these names into the IP addresses that it prefers to work with. Cisco supports two methods for resolving hostnames into IP addresses. You can either use static host entries, as we do in this recipe, or DNS, as we..
