BGP-learned defaults are injected into EIGRP via redistribution. The 0/0 metric needs to be converted into an EIGRP-compatible metric by using the default-metric router subcommand. The configuration for RTA in Example 12-51 will inject its default with a high metric in such a way that the internal router (RTG) always gets a lower metric via RTF. Example 12-51. Using EIGRP as the IGP: RTA Configuration router eigrp 1 redistribute bgp 3 route-map DEFAULT_ONLY passive-interfac..
All the options for IP forwarding (routing) in this chapter had one thing in common: The destination IP address in the packet header was the only thing in the packet that was used to determine how the packet was forwarded. Policy routing allows a router to make routing decisions based on information besides the destination IP address. Policy routing’s logic begins with the ip policy command on an interface. This command tells IOS to process incoming packets with different l..
Testing the Syslog Sever Configuration
The Bourne shell script in Example 18-2 emulates syslog messages at various severity levels to ensure that your server routes them to the correct location. By default, the script will emulate syslog messages to the local7 syslog facility, since Cisco routers default to local7, but the logging facility is completely configurable. No arguments are required or expected. Example 18-2. testlog.sh #!/bin/sh # # testlog.sh -- a script to test the syslog facility t..
The access layer is present where the end users are connected to the network. Access switches usually provide Layer 2 (VLAN) connectivity between users. Devices in this layer, sometimes called building access switches, should have the following capabilities: ■ Low cost per switch port ■ High port density ■ Scalable uplinks to higher layers ■ User access functions such as VLAN membership, traffic and protocol filtering, and quality of service (QoS) ■ Resiliency throu..
Manually Configuring STP Timers
Use one or more of the following global configuration commands to modify STP timers: Switch(config)# spanning-tree [vlan vlan-id] hello-time seconds Switch(config)# spanning-tree [vlan vlan-id] forward-time seconds Switch(config)# spanning-tree [vlan vlan-id] max-age seconds Notice that the timers can be changed for a single instance (VLAN) of STP on the switch by using the vlan vlan-id parameters. If you omit the vlan keyword, the timer values are configured for all in..
