Specifications

23-16
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 23 Configuring BXM Virtual Switch Interfaces
Overview: How VSI Works
Compatibility
The card uses a flag in the capability message to report multiple partition capability. Firmware releases
that do not support multiple partitions set this flag off. The multiple partitions capability is treated as a
card attribute and added to the attribute list.
Use of a partition with ID higher than 1 requires support for multiple VSI partitions in both switch
software and BXM firmware, even if this is the only partition active on a the card. In a y-red pair
configuration, the multiple partition capability is determined by the minimum of the two cards.
A card with no multiple partition capabilities will mismatch if any of the interfaces has an active
partition with ID higher than 1. Attempts to enable a partition with ID higher than 1 in a logical card
that does not support multiple partitions will be blocked.
Multiple Partition Example
Each logical switch can be seen as a collection of interfaces each with an associated set of resources.
Consider a BPX switch with 4 interfaces:
• 10.1
• 10.2.1
• 11.1
• 11.7.1
Also assume the resource partitioning in Table 23-4.
Figure 23-6 Virtual Switches
P2
P1
AR
ifc 10.1
ifc 10.2.1
BXM
AR
P2
P1
P1
ifc 11.1
ifc 11.7.1
BXM
AR
IGX
29857