Enabling RIP and the Effects of Autosummarization
Example 8-4 covers basic RIP configuration, the meaning and implication of the RIP network command, and the effects of the default setting for autosummarization. To examine just those functions, Example 8-4 shows the related RIP configuration on R1, R2, and R6, along with some command output. Example 8-4 Basic RIP Configuration on R1, R2, R4, and S1 A couple of points from this example need a little more explanation. The RIP network command only allows for a classful..
The following list describes the process that occurs when a radio card uses passive scanning: 1. The radio card automatically tunes to each RF channel, listens for a period of time, and records information it finds regarding access points on each channel. 2. 2. By default, each access point transmits a beacon frame every 100 milliseconds on a specific RF channel, which the administrator configures. 3. While tuned to a specific channel, t..
Complete sequence number PDU (CSNP) has a fixed header with TLV appended. Each of these TLVs represents an LSP in the link-state database. The following summary information is carried regarding each LSP: The LSP ID The sequence number The LSP checksum The remaining lifetime CSNP is like a database description packet, as in OSPF. Because IS-IS does not have difficulty with synchronization, as OSPF does, the DIS sends a CSNP every 10 seconds o..
IGMPv1 Host Membership Query Functions
Multicast routers use the IGMPv1 Host Membership Query message to determine whether it has any host on any of its LAN interfaces that wants multicast traffic for any group. The IGMPv1 Host Membership Query message is sent only by multicast routers on LAN interfaces. For example, Figure 19-8 shows the IGMPv1 Host Membership Query process. It lists two steps, with the second step being the router sending the Query. Figure 19-8 IGMPv1 Host Membership Query Process The de..
Bridges provide more user bandwidth by reducing the number of devices contending for the segment bandwidth. But bridges also provide additional bandwidth by controlling data flow in a network. Bridges forward traffic only to the interface(s) that need to receive the traffic. In the case of known unicast traffic, bridges forward the traffic to a single port rather than to all ports. Why consume bandwidth on a segment where the intended destination does not exist? Transparent ..
