Applications
Central Site
PB S200
(Single Node or Cluster)
Branch XX
PB S200
Host
Figure 1-4. Regional Concentrator Example
Cluster Application An important new feature available with the PathBuilder S24x, 26x, and 27x switch is its use in a cluster. This allows as many as four PathBuilder S24x, 26x, and 27x switches to act a single unit for the purposes of connectivity. Though configured and managed as individual nodes, when the PathBuilder S24x, 26x, and 27x switches are clustered together, devices attached to access ports on one node can have calls routed out the network port of one of the other nodes.
The three high-speed ports on the PathBuilder S24x, 26x, and 27x switch motherboard provide networking channels between the nodes to pass traffic from network ports to access ports. The PathBuilder S24x, 26x, and 27x switch cluster allows for high port count and throughput primarily in support of the regional concentrator applications.
The example in Figure 1-5is a full mesh cluster which means that any access link can reach any host connection. If a PathBuilder S24x, 26x, and 27x switch node within the cluster fails, only those links and host connections directly connected to that node go down. Placement of host equipment, and use of redundant host equipment can minimize the impact of any individual node failure. Furthermore, Link Back Up features in the remotes can limit the degree of remote isolation if part of the PathBuilder S24x, 26x, and 27x switch cluster fails.
About the PathBuilder S24x, 26x, and 27x switch | 1-5 |
