By Tom Sheldon, Thomas Sheldon
This encyclopaedia seeks to aid readers comprehend networks and international communications structures by way of supplying succinct executive-style briefings of vital networking applied sciences, in addition to easily-digestible diagrams that illustrate key themes, topologies, architectures and configurations. The accompanying CD-ROM features a totally searchable model of the booklet, extra wide insurance of issues, and links to suitable sites.
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Additional info for McGraw Hill's Encyclopedia of Networking and Telecommunications with CDROM
Example text
Cisco further recommends that the spanning-tree vlan x root primary or the spanning-tree vlan x root secondary command be used instead to modify the switch timers. Verifying STP show spanning-tree Switch#s Displays STP information show spanning-tree active Switch#s Displays STP information on active interfaces only show spanning-tree brief Switch#s Displays a brief status of the STP show spanning-tree detail Switch#s Displays a detailed summary of interface information show spanning-tree Switch#s interface gigabitethernet 0/1 Displays STP information for interface gigabitethernet 0/1 show spanning-tree summary Switch#s Displays a summary of port states s h o w s p a n n i n g - t r e e s u m m a ry Switch#s totals Displays the total lines of the STP section show spanning-tree vlan 5 Switch#s Displays STP information for VLAN 5 22 Spanning Tree Protocol Optional STP Configurations Although the following commands are not mandatory for STP to work, you might find these helpful in fine-tuning your network.
Src-dst-mac Distribution is based on source and destination MAC address. src-ip Distribution is based on source IP address. src-mac Distribution is based on source MAC address. Packets from different hosts use different ports in the channel, but packets from the same host use the same port. show etherchannel loadSwitch#s balance Displays EtherChannel load-balancing information Configuration Example: EtherChannel Figure 3-2 shows the network topology for the configuration that follows, which shows how to configure EtherChannel using commands covered in this chapter.
1 and moves to subinterface configuration mode description Router(config-subif)#d Management VLAN 1 (Optional) Sets locally significant descriptor of the subinterface encapsulation Router(config-subif)#e dot1q 1 native Assigns VLAN 1 to this subinterface. VLAN 1 will be the native VLAN. 1Q trunking protocol. 10 and moves to subinterface configuration mode description Router(config-subif)#d Accounting VLAN 10 (Optional) Sets locally significant descriptor of the subinterface encapsulation Router(config-subif)#e dot1q 10 Assigns VLAN 10 to this subinterface.