All MIBs › CENTILLION-SOURCE-ROUTING-MIB
Category: ATM, SNA and Legacy Protocols, Vendor: Nortel
Description: Manages Token Ring source routing bridge configuration and statistics on Nortel Centillion switch platforms.
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What Is CENTILLION-SOURCE-ROUTING-MIB?
CENTILLION-SOURCE-ROUTING-MIB is a Bay Networks (Nortel Centillion) enterprise MIB that manages Token Ring source-routing bridge configuration on Centillion switch platforms, rooted under cndot1dSr from CENTILLION-BRIDGE-MIB. It defines cndot1dSrPortTable (indexed by cndot1dSrPort) exposing per-port hop-count limits for All-Paths-Explorer and Spanning-Tree-Explorer frames (cndot1dSrPortAREHopCount, cndot1dSrPortSTEHopCount), plus scalar controls cndot1dSrExplorerProxy (whether the bridge proxies explorer packets) and cndot1dSrBridgeNum (the source-routing bridge number, 0–15, shared across a Token Ring SR bridge group). These objects expose the bridge's source-routing control-plane configuration, useful for confirming explorer-frame handling limits and bridge numbering are consistent across a Token Ring SR bridge group to avoid routing loops or explorer storms. It depends on CENTILLION-ROOT-MIB for the EnableIndicator type and on CENTILLION-BRIDGE-MIB for the cndot1dSr base object, and is deployed on Nortel Centillion switches operating in legacy Token Ring source-routing bridge environments. Teams still supporting this legacy hardware frequently keep a CENTILLION-SOURCE-ROUTING-MIB download handy for reference.
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Supported Devices
- Nortel/Bay Networks Centillion Token Ring switches
Monitoring Examples
An operator polls cndot1dSrPortTable's cndot1dSrPortAREHopCount and cndot1dSrPortSTEHopCount for a given port to confirm explorer frame hop limits match the network's ring topology, and checks cndot1dSrBridgeNum to verify it is consistent with other bridges in the same SR bridge group; a duplicate or mismatched bridge number across bridges spanning the same segments would indicate a misconfiguration likely to cause explorer frame looping.
What Can Be Monitored
- per-port explorer frame hop-count limits (ARE/STE)
- explorer packet proxy setting
- source-routing bridge number assignment
Imported Objects
OIDs
RFC description
Controls source routing configuration for Token Ring ports on Centillion/Bay Networks bridges.
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