Dynamically Finding the RP Using BSR

Cisco provided the proprietary Auto-RP feature to solve a couple of specific problems. PIM Version 2, which came later, provided a different solution to the same problem, namely the BootStrap Router (BSR) feature. From a very general perspective, BSR works similarly to Auto-RP. Each RP sends a message to another router, which collects the group-to-RP mapping information. That router then distributes the mapping information to the PIM routers. However, any examination of BSR b..

Call-Signaling TCP/UDP Ports in Use

In this design chapter, to keep the examples relatively simple, only Skinny Call Control Protocol (SCCP) ports (TCP ports 20002002) are used to identify call-signaling protocols. However, SCCP is by no means the only call-signaling protocol used in IP Telephony environments. Table 12-1 shows many of the TCP/UDP ports used in a Cisco CallManager environment.   Table 12-1. Example TDP/UDP Ports Used in a Cisco CallManager Environment Prot..

Configuring Cisco IOS MLP LFI for Frame Relay on a Cisco Router

This section describes the configuration tasks involved in setting up the LFI feature for Frame Relay virtual circuits on a Cisco router. Note that the Cisco IOS software supports LFI via MLP, LFI via MLP over Frame Relay, and LFI via MLP over ATM. In this section, only the configuration tasks concerning LFI via MLP over Frame Relay virtual circuits are discussed. NOTE The Cisco IOS MLP LFI feature for Frame Relay and ATM virtual circuits is released in Cisco IOS Release 12..

Rewriting the Network Prefix

Sometimes you need to connect your network to another network that uses an unregistered range, such as 172.16.0.0/16. However, if you already use this range in your network, the easiest thing to do is to simply replace this prefix with another one that doesn't have a conflict, such as 172.17.0.0/16: Router#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#ip nat outside source static network 172.16.0.0 172.17.0.0 /16 no-al..

Deploying VLANs

 To implement VLANs, you must consider the number of VLANs you need and how best to place them. As usual, the number of VLANs depends on traffic patterns, application types, segmentation of common workgroups, and network-management requirements. An important factor to consider is the relationship between VLANs and the IP addressing schemes used. Cisco recommends a one-to-one correspondence between VLANs and IP subnets. This recommendation means that if a subnet with a 24..