网络互联与路由器技术项目五 vlan技术在企业网络中的应用.pptVIP

Emphasize: Layer 2 has no mechanism (like a TTL) to stop loops. Emphasize: Layer 2 has no mechanism (like a TTL) to stop loops. Purpose: Emphasize: A VLAN is a broadcast domain. Note: In order to have inter-VLAN communications, a router is required. Layer 3 of 3 Emphasize: A trunk is used to connect two switches together. A trunk carries traffic for multiple VLANs. Only the Fast Ethernet ports on the 1900 can be configured as trunk port. Trunking is off by default on the 1900 Fast Ethernet ports (fa 0/26 and fa 0/27). Note: The 1900 supports DISL. At the time of the beta, the core switch (2900xl) doesn’t support DISL. Note: Once a port has been assigned to a VLAN, it cannot send or receive traffic from devices in another VLAN without the intervention of a Layer 3 device like a router. The 1900 can’t be configure as the VMPS. A CiscoWorks 2000 or CWSI management station or a Catalyst 5000 switch can be configured as the VMPS. In the future, dynamic VLANs may also offer membership based on other criteria such as protocol or application. Dynamic VLANs are covered in the Managing Cisco Switched Internetworks class. Note: In the ICND lab, all the switches and routers are in VLAN1. The core server and the core router are in multiple VLANs. Each workgroup PC is on an unique VLAN. Note: In the ICND lab, all the switches and routers are in VLAN1. The core server and the core router are in multiple VLANs. Each workgroup PC is on an unique VLAN. Layer 2 of 2 Note: The output shows that there are currently no ports assigned to VLAN9. Layer 2 of 2 Note: In the lab, we will only be configuring static VLAN membership. Layer 2 of 2 Emphasize: Port 1 = e0/1, ……. AUI = e0/25, A = fa 0/26, B = fa 0/27 Note: In the ICND lab, all the switches and routers are in VLAN1. The core server and the core router are in multiple VLANs. Each workgroup PC is on an unique VLAN. Layer 2 of 2 Note: The Catalyst 1900,at the time of the beta, only supports ISL trunking. It does no