This section covers the concepts behind four separate methods for finding the RP. Three are specific configuration features, namely static configuration, Auto-RP, and BSR. The fourth, Anycast RP, actually uses any of the first three methods, but with the design that includes having the RPs use the same unicast IP address to achieve better redundancy features. Table 20-3 summarizes the methods of finding the RP with PIM-SM. Table 20-3 Comparison of Methods of Finding the RP
The remainder of this chapter will focus on troubleshooting some common problems when using the Cisco VPN Client software. The first topic I'll discuss is the logging abilities of the software client: the Log Viewer component of the VPN Client. Then I'll discuss some common problems you'll typically come across and what to look for on your computer (or concentrator) to troubleshoot these problems: • Authentication Problems • ISAKM..
When you configure a router's serial interface, you need to specify the encapsulation, the IP address, and whether the interface will be the DCE or DTE: Router3#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router3(config)#interface Serial1 Router3(config-if)#description WAN Connection to Chicago Router3(config-if)#ip address 192.168.99.5 255.255.255.252 Router3(config-if)#encapsulation hdlc Router3(config-if)#clock rate 56000 Router3..
The fourth criteria of an STP decision is the port ID. The port ID value that a switch uses is actually a 16-bit quantity: 8 bits for the port priority and 8 bits for the port number. The port priority is a value from 0 to 255 and defaults to 128 for all ports. The port number can range from 0 to 255 and represents the port’s actual physical mapping. Port numbers begin with 1 at port 0/1 and increment across each module. (The numbers might not be consecutive because each mo..
Limiting the Impact of IP Helper Addresses
The ip helper-address command implicitly enables forwarding several different kinds of UDP broadcasts. You can prevent the router from forwarding the unwanted types of broadcasts with the no ip forward-protocol udp configuration command: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#no ip forward-protocol udp tftp Router1(config)#no ip forward-protocol udp nameserver Router1(config)#no ip forward-protocol u..
