Convergence in a Frame-Mode MPLS Network

An important aspect in MPLS network design is the convergence time of the network. Some MPLS applications (for example, an MPLS/VPN or BGP design based on MPLS) do not work correctly unless a labeled packet can be sent all the way through from the ingress Edge-LSR to the egress Edge-LSR. In these applications, the convergence time needed by an Interior Gateway Protocol (IGP) to converge around a failure in the core network could be increased by the label propagation delay. I..

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-..

Using Custom Queuing

Implementing Custom Queuing on a router is a two-step procedure. First, you must define the traffic types that will populate your queues. And then you apply the queuing method to an interface: Router#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#access-list 103 permit ip any any precedence 5 Router(config)#access-list 104 permit ip any any precedence 4 Router(config)#access-list 105 permit ip any any precedence 3 Router(..

Port Duplex Mode

You also can assign a specific link mode to Ethernet-based switch ports. Therefore, the port operates in half-duplex, full-duplex, or autonegotiated mode. Autonegotiation is allowed only on UTP Fast Ethernet and Gigabit Ethernet ports. In this mode, the port participates in a negotiation by attempting full-duplex operation first and then halfduplex operation if full duplex is not successful. The autonegotiation process repeats whenever the link status changes. Be sure to set..

Configuring a DHCP Database Client

You can ensure your DHCP address assignments are not lost when a router reloads by configuring the router to periodically copy its DHCP database to a remote server. The first example configures a router to use FTP to copy the DHCP database to a remote server: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router1(config)#ip dhcp database ftp://dhcp:bindsave@172.25.1.1/dhcp-leases Router1(config)#end Router1# The second ex..