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..
Defining the Router ID and Loopback Interfaces
The router needs an ID to participate in the OSPF domain. The router ID is used to identify LSAs in the OSPF database. The router ID can be defined by an administrator or left to the discretion of the router. Most people define the ID so that it is easier to track events in the network, for internal documentation, and for other system-administration purposes. The OSPF router ID can be defined by the router-id command. If the router-id command is not present, then the ..
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..
RSVP-TE Control-Plane and Forwarding-Plane Components
Now that the usage of RSVP-TE in MPLS-TE has been reviewed, focus turns to the main topic of this chapter: the RSVP-TE control-plane restart. In this chapter, the term FEC refers to an aggregate of data flows defined in terms of filters such as source IP address and other fields in the packet header. Each LSP tunnel is associated with a FEC that specifies which particular set of packets is to be mapped onto the LSP tunnel. RSVP-TE is used to create both resource reservations ..
Use the ntp max-associations configuration command to limit the number of NTP associations the router will accept: Router#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#ntp max-associations 30 Router(config)#end Router# To prevent oversubscribing valuable router resources by NTP associations, Cisco provides the ability to limit the number of associations that a router will accept. While the ntp max-associations command..
