Redistributing a Subset of Routes Using a Route Map
Route maps can be referenced by any redistribute command. The route map may actually let allthe routes through, setting different route attributes (for example, metrics) for different routes. Or,it may match some routes with a deny clause, which prevents the route from being redistributed.(Refer to Figure 11-1 for a review of route map logic.)Figure 11-3 and Example 11-2 show an example of mutual redistribution between EIGRP andOSPF, with some routes being either filtered or ..
RIPng for IPv6 is based on RIPv2, but it is not an extension of RIPv2; it is an entirely separate protocol. RIPng does not support IPv4, so to use RIP to route both IPv4 and IPv6, you must run RIPv1 or v2 for IPv4 and RIPng for IPv6. RIPng uses the same timers, procedures, and message types as RIPv2. For example, like RIPv2 it uses a 30-second update timer jittered to prevent message synchronization, a 180-second timeout period, a 120-second garbage-collection timer, and a 1..
IP networks of the mid-1990s were invariably best-effort networks, and the Internet, as a whole, remains so today. Privately owned enterprise and service provider networks, though, have been widely transformed from best-effort models to more complex differentiated services models, meaning that the network gives different applications differing levels of service. Figure 1-1 shows the broad steps in the evolution of QoS concepts since the early 1990s. Figure 1-1. QoS Evolution..
Using SNMP to Perform Mass Configuration Changes
The following Perl script will distribute configuration commands to a large number of routers. It works by using SNMP to trigger TFTP file transfers into the routers. In effect, this script lets you automatically distribute a series configuration commands to a list of routers. Automating routine changes like this saves time and effort, but more importantly, it virtually eliminates typographical mistakes. Here's some example output: Freebsd% ./snmpcfg.pl =====================..
Configuring Multilink Frame Relay on Cisco Routers
This section looks at the configuration tasks required to configure the Multilink Frame Relay feature on a Cisco router. In addition, all Multilink Frame Relay-related commands supported by the Cisco IOS are discussed. The following procedures outline the steps required to create a bundle interface, configure the physical serial interfaces as bundle links, and associate the bundle links with the bundle interface. The optional configuration commands for tuning Multilink Frame..
