Several DiffServ RFCs suggest a set of values to use in the DSCP field and an implied meaning for those settings. For instance, RFC 2598 defines a DSCP of decimal 46, with a name Expedited Forwarding (EF). According to that RFC, packets marked as EF should be given queuing preference so that they experience minimal latency, but the packets should be policed to prevent them from taking over a link and preventing any other types of traffic from exiting an interface during perio..
Configuring OSPF with the Broadcast Network Type
With the broadcast OSPF network type, neighbors are automatically discovered and the hello timer is faster than with NBMA. Configuring a broadcast interface just involves changing the OSPF network type—no neighbor statements are required. The broadcast OSPF network type works best with a fully meshed network. Example 6-3 shows a typical configuration of the broadcast OPSF network type. Example 6-3. Configuring a Broadcast Network
Setting FRTS Parameters Explicitly
The frame-relay cir, frame-relay Bc, and frame-relay Be commands can be used to directly set FRTS parameters in an FRTS map class, instead of setting the Bc, Be, and Tc values indirectly using the frame-relay traffic-rate command. Example 16-6 shows two new map classes on the same router configured in Example 16-5. These new map classes use these additional commands to set FRTS parameters explicitly, which is particularly useful for tuning FRTS to use a small Tc. Example 16-..
Defining and Limiting CBWFQ Bandwidth
Cisco IOS checks a CBWFQ policy map to ensure that it does not allocate too much bandwidth. IOS performs the check when the service-policy output command is added; if the policy map defines too much bandwidth for that interface, the service-policy command is rejected. IOS defines the allowed bandwidth based on two interface subcommands: the bandwidth command,and the reserved bandwidth implied by the max-reserved-bandwidth command (abbreviated hereafter as int-bw and max-res, ..
This pair of router configurations shows how to define a tunnel connecting two serial ports supporting Bisync (BSC or Binary Synchronous Communications) devices: BSTUN-A#configure terminal Enter configuration commands, one per line. End with CNTL/Z. BSTUN-A(config)#interface Loopback0 BSTUN-A(config-if)#ip address 10.1.16.5 255.255.255.252 BSTUN-A(config-if)#exit BSTUN-A(config)#bstun peer-name 10.1.16.5 BSTUN-A(config)#bstun protocol-group 1 bsc BSTUN-A(config)#interf..
