Cisco Bug: CSCup94206 - Spanning-tree uplinkfast doesn't work on connection GE to FE
Feb 23, 2018
- Cisco 800 Series Routers
Known Affected Releases
Symptom: Spanning-tree uplinkfast doesn't work on connection GE to FE Conditions: [Test Procedure] 1. Connect UUT's GE switchport1 to PEER's GE switchport1 2. Connect UUT's GE switchport2 to PEER2's FE switchport1 3. Connect PEER's GE switchport2 to PEER2's FE switchport2 4. Configure above 6 interfaces "switchport access vlan 1" 5. Enable "spanning-tree vlan 1" on above 3 devices 6. Enable "spanning-tree uplinkfast" on UUT 7. Let PEER2 become spanning-tree router and UUT's GE switchport2 "FWD", GE switchport1 "BLK" 8. Shutdown PEER2's FE switchport1 [The Observation] For uplinkfast enabled, blocked GE switchport1 should become "FWD" in 5 seconds. However, it needs 30 seconds.
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