Configuring the Default Metric for OSPF, IS-IS, RIP, or BGP
It is possible to redistribute the routing protocol and then, with a separate command, to state the default metric. There is no advantage to handling metric assignment within the redistribute command or separately. IS-IS cannot define a default metric. The metric must be stated when redistributing. If no metric is stated, the default (0 cost) is entered and the route discarded. To configure the default metric for OSPF, RIP, or BGP, use the following command syntax: Ro..
Label Binding and Distribution
As soon as the Label Information Base (LIB) is created in a router, a label is assigned to every Forward Equivalence Class known to the router. For unicast destination-based routing, the FEC is equivalent to an IGP prefix in the IP routing table. Thus, a label is assigned to every prefix in the IP routing table and the mapping between the two is stored in the LIB. NOTE Labels are not assigned to BGP routes in the IP routing table. The BGP routes use the same label as the int..
The Cisco SAFE Blueprint document (available at http://www.cisco.com/go/safe) suggests a wide variety of best practices for switch security. In most cases, the recommendations depend on one of three general characterizations of the switch ports, as follows: ■ Unused ports—Switch ports that are not yet connected to any device—for example, switch ports that are pre-cabled to a faceplate in an empty cubicle ■ User ports—Ports cabled to end-user devices, or any cablin..
Every number in the decimal number system can be represented using ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. You are familiar with these symbols and how to use them to represent a number. For example, when you see the number 123, you know that it represents one hundred and twenty-three. But what are the rules that tell you that the symbols 123 represent one hundred twenty-three? The rule you use is the rule of positional value. Start counting and see what happens: 0 1 2 ..
SDLC is a serial protocol that is commonly used for SNA devices. It is extremely popular in financial environments for devices such as banking machines, card readers, and account printers. Using SDLC in conjunction with DLSw is becoming increasingly common in these sorts of situations. This allows the remote SDLC devices to communicate with the Token Ring Interface Coupler (TIC) on a mainframe computer through an IP network. There is a huge advantage to this because it means ..
