Extreme Networks ExtremeWare Enterprise Manager Betriebsanweisung Seite 189

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10-19
ESRP C
OMMANDS
Figure 10-9: ESRP example using layer 2 redundancy
This example builds on the previous example, but eliminates the requirement of layer 3
redundancy. It has the following features:
An additional VLAN, Engineering, is added that uses layer 2 redundancy.
The VLAN Sales uses three active links to each BlackDiamond switch.
The VLAN Engineering has two active links to each BlackDiamond switch.
The third Summit switch carries traffic for both VLANs.
The link between the third Summit switch and the first BlackDiamond switch uses
802.1Q tagging to carry traffic from both VLANs traffic on one link. The
BlackDiamond switch counts the link active for each VLAN.
The second BlackDiamond switch has a separate physical port for each VLAN
connected to the third Summit switch.
EW_022
Sales master,
Engineering standby
Sales
Sales standby,
Engineering master
Sales
Sales - untagged link
Sales +
Engineering
Engineering
Engineering - untagged link
Sales + Engineering - tagged link
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