Cisco PSA Microcode MIB - Overview
The PSA is the Packet Switching ASIC used
in module like engine 2(E2) line cards in GSR
for IP and MPLS packets forwarding. The PSA
performs IP and MPLS packet forwarding at 4 Mpps.
The list of features supported by the PSA
includes (but is not limited to):
- Input and Output ACLs
- Frame Relay Switching
- MPLS VPN
- BGP policy accounting
- IP packet coloring
- Sampled Net flow
- ATM over MPLS.
- Source MAC Accounting.
- Unicast RPF
Note that all the features are not
supported simultaneously on a module.
Each microcode bundle/set can support
one or a limited number of the features
listed above. Each feature has a priority.
When a feature (ACL, Sampled NetFlow) is
enabled through the CLI, the higher
priority feature will take precedence
over the lower priority feature. The
microcode for the lower priority is
removed and cleaned up. The higher
priority microcode will be loaded.
Later, if the higher priority feature
is removed, the lower priority microcode
will be loaded again.
This MIB contains information about the microcode
bundles on modules like E2 Line Cards(LC) in GSR.
Since microcode reload is a service interrupting
event, this MIB also defines a notification to
inform management stations that such an event has