Vendor560 problems· 4 reviewed

Cisco

560 incident problems in Cisco environments.

All problems (560)

NETWORK-1516A VLAN migration completes and one voice subnet loopsVoice endpoints loop only on ports cloned from an older access template during migration.NetworkIntermediate9 minPro NETWORK-1526A VLAN migration completes and one voice subnet loopsVoice endpoints loop only on ports cloned from an older access template.NetworkIntermediate9 minPro NETWORK-1496A VLAN migration completes and one voice subnet still loopsVoice endpoints loop only on ports cloned from an older access template during a VLAN migration.NetworkIntermediate9 minPro NETWORK-1576An OSPF template update lands and one router still advertises from passive modeOne router still acts passive after an OSPF template update.NetworkIntermediate9 minPro NETWORK-1470A BGP max-prefix alarm never escalatesA peer nearly tears down on max-prefix without the usual alert after a network OS refresh.NetworkIntermediate10 minPro NETWORK-1480A BGP session remains up and telemetry still hides a route leakRoute leak indicators are missed because telemetry is grouped at the peer-group level instead of per neighbor.NetworkIntermediate10 minPro NETWORK-1494A BGP session stays established and one prefix set disappearsA prefix set vanishes only after traffic moves to the standby multivendor edge pair.NetworkIntermediate10 minPro NETWORK-1504A BGP session stays established and one prefix set disappearsA prefix set vanishes only after traffic moves to the standby multivendor edge.NetworkIntermediate10 minPro NETWORK-1514A BGP session stays up and one prefix set disappearsA prefix set vanishes only after traffic moves to the standby multivendor edge.NetworkIntermediate10 minPro NETWORK-1524A BGP session stays up and one prefix set disappearsA prefix set vanishes only after traffic moves to the standby multivendor edge.NetworkIntermediate10 minPro NETWORK-1457A DHCP relay path works on one leaf and fails on anotherClients on one leaf never get expected leases after relay metadata was standardized across the fabric.NetworkIntermediate10 minPro NETWORK-1489A DHCP relay sends Option 82 correctly and one scope still misassignsClients in one closet keep receiving the wrong scope after an access switch replacement.NetworkIntermediate10 minPro NETWORK-1483A Cisco GRE tunnel forms and OSPF still flapsAn OSPF over GRE path flaps only when larger updates cross after a tunnel template merge.NetworkIntermediate11 minPro NETWORK-1392A BGP route reflector session is healthy and one site's routes lose preferenceA BGP route reflector session is healthy and one site's routes lose preference focuses on routing-protocols and asks the reader to isolate the key signal in Cisco. Route preference bugs often come from attribute mutation upst...NetworkIntermediate12 minPro NETWORK-1382A BGP session is established and routes never winA BGP session is established and routes never win focuses on routing-protocols and asks the reader to isolate the key signal in Cisco. Route policy chains can break when one stage renames communities another stage still depends...NetworkIntermediate12 minPro NETWORK-1335A Cisco DHCP relay works and one subnet never gets leasesA Cisco DHCP relay works and one subnet never gets leases focuses on network-segmentation and asks the reader to isolate the key signal in Cisco. Helper addresses alone do not define what identity the DHCP server sees the relay as.NetworkIntermediate13 minPro NETWORK-1322An OSPF adjacency stays in EXSTARTA routed handoff is moved to a subinterface and later OSPF neighbors stop progressing beyond EXSTART or EXCHANGE.NetworkIntermediate13 minPro NETWORK-1362An OSPF adjacency stays in EXSTART after a subinterface moveA routed handoff is migrated to a subinterface and later OSPF neighbors stop progressing beyond EXSTART or EXCHANGE.NetworkIntermediate13 minPro NETWORK-1277Manual DNS testing passesA DNS incident appears solved after a manual command, but applications continue failing in production.NetworkIntermediate13 minPro NETWORK-1313A BGP route map change looks harmless and one edge loses reachabilityA BGP route map change looks harmless and one edge loses reachability focuses on bgp-policy-basics and asks the reader to isolate the key signal in Cisco. Policy clauses can be individually correct and collectively wrong when order changes.NetworkIntermediate14 minPro