Cisco Cisco 1700 2600 3600 3700 Series VPN Module White Paper
© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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Figure 8. Quad-Sup Uplink Forwarding VSL Configuration
Quad-Sup Uplink Forwarding VSL design using all 10 Gigabit ports on the supervisor modules:
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Maintains 20 Gbps VSL bandwidth in the event of a supervisor failure
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Maintains at least one locally attached VSL port to the active supervisor, in the event of a supervisor module
failure
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Requires no additional line cards
If additional bandwidth is needed for the VSL, additional 10 Gigabit ports from supported line cards can be used.
Up to eight ports per port channel can be added, just like any other port channel interface.
Multiple Cisco Virtual Switching System Domains
Multiple deployments of Cisco Virtual Switching System can exist in a given network design, adding to the
availability and scalability of the network. As a result, Cisco requires that you use unique virtual switch domain
identifiers for each pair of VSS switches.
Figure 10 shows an example of multiple Cisco Virtual Switching System domains in a network design. The figure
shows three unique VSS domains, each with a unique domain ID. You can also deploy multichassis Cisco
EtherChannel links across other Cisco Virtual Switching Systems, removing the reliance on protocols such as
Spanning Tree Protocol.
Figure 9. Multiple Cisco Virtual Switching System Domains