Black hole filtering is an alternative technique you can deploy in place of access control lists to filter out undesired traffic. You create black hole filters by creating specific routes for the traffic that needs to be filtered and then pointing these routes to a null interface. A null interface cannot pass traffic, so it drops the traffic. This has some performance gains over traditional access list filtering. In the case of access lists, the traffic first has to be routed..
The MPLS architecture, as discussed so far, enables the smooth integration of traditional routers and ATM switches in a unified IP backbone (IP+ATM architecture). The real power of MPLS, however, lies in other applications that were made possible, ranging from traffic engineering to peer-to-peer Virtual Private Networks. All MPLS applications use control-plane functionality similar to the IP routing control plane shown in Figure C-6 to set up the label switching database. Fig..
Standard and extended access lists filter IP traffic. An access list is basically a set of permit or deny statements. Standard access lists control IP traffic based on the source address only. Extended access lists can filter on source and destination addresses. Extended access lists can also filter on specific protocols and port numbers. This section covers how a Cisco router handles access lists. Access Lists on Cisco Routers By default, a Cisco router permits all IP and ..
Multilayer switching began as a dual effort between a route processor (RP) and a switching engine (SE). The basic idea is to “route once and switch many.” The RP receives the first packet of a new traffic flow between two hosts, as usual. A routing decision is made, and the packet is forwarded toward the destination. To participate in multilayer switching, the SE must know the identity of each RP. The SE then can listen in to the first packet going to the router and also..
Supported Cisco Platforms for Frame Relay to ATM Interworking
This section presents an overview of the Cisco router platforms that support the Frame Relay to ATM Interworking feature. During the early development stage, not all Cisco router platforms offer the support for the Frame Relay to ATM interworking function. The early supported router platforms include the Cisco MC3810, the Cisco 2600 series, the Cisco 3600 series, and the Cisco 7200 series. For Cisco IOS software support, the Frame Relay to ATM Interworking feature is availab..
