一个Cisco干线对Gigabit (1000 BaseT)支持的问题

1/6/2008来源:Cisco网络人气:2523


  问题
  Cisco干线对Gigabit (1000 BaseT)支持的打算是什么?
  构型
  子系统 - Networking
  解决方法
  Cisco由专门的方法创建VLANs,这称为Inter-Switch-Link, 或 ISL,有时这也被作为ISL 要求进行一些硬件变化, HP 接口都不支持这些硬件变化。
  
  802.1Q标准指定了VLAN Tagging 。这最终会取代ISL 。VLAN Tagging 让接口使用唯一的标签来标识每个构件,这样可以识别该属于哪个VLAN。只要VLANs是802.1Q兼容的,802.1Q 答应一个接口参与多个 VLANs 。
  因为我们并不非常需要一个接口参与多个 VLANs,所以HP的网卡并不支持802.1Q 或主干线。
  .........following with all English text ....PROBLEM
  What are the plans for Gigabit (1000 BaseT) support of Cisco trunking?
  
  CONFIGURATION
  Subsystem - Networking
  RESOLUTION
  Cisco has a proprietary method for creating VLANs called
  Inter-Switch-Link, or ISL. This is sometimes referred to as 'trunking'.
  ISL requires hardware changes, and none of the HP interfaces support these hardware changes.
  
  The 802.1Q standard specifies VLAN Tagging. This will eventually 'supercede', or replace ISL. VLAN Tagging allows the interface to 'tag' each frame with a unique tag that identifies the VLAN to which
  the frame is destined. 802.1Q allows an interface to participate in
  Multiple VLANs, as long as the VLANs are 802.1Q-compliant.
  Because there is not yet a large demand for NICs to participate in
  multiple VLANs, HP's network cards do not support 802.1Q or trunking.
  Networking: supporting Gigabit (1000 BaseT) with Cisco trunking
  PROBLEM
  What are the plans for Gigabit (1000 BaseT) support of Cisco trunking?
  
  CONFIGURATION
  Subsystem - Networking
  RESOLUTION
  Cisco has a proprietary method for creating VLANs called Inter-Switch-Link, or ISL. This is sometimes referred to as 'trunking'.
  ISL requires hardware changes, and none of the HP interfaces support these hardware changes.
  
  The 802.1Q standard specifies VLAN Tagging. This will eventually 'supercede', or replace ISL. VLAN Tagging allows the interface to 'tag' each frame with a unique tag that identifies the VLAN to which the frame is destined. 802.1Q allows an interface to participate in Multiple VLANs, as long as the VLANs are 802.1Q-compliant.
  Because there is not yet a large demand for NICs to participate in multiple VLANs, HP's network cards do not support 802.1Q or trunking.