troubleshooting 归档 - 第2页共2页

Juniper EX guide: fix an IRB/VLAN interface that won't come up. Check admin status, re-enable the unit, verify VLAN mapping with show vlans, then f

admin 2026-08-23

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General troubleshooting for Cisco NCS 1002 (IOS XR 6.3.x-7.3.x): software validation, unreachable nodes, optical loopbacks, breakout ports, failed

admin 2026-08-23

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TAC case: Catalyst 9300 learned the gateway MAC on random access ports, breaking a VLAN. How packet reflection, dot1x MAB and stuck MACs caused it,

admin 2026-08-23

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Configure and verify BFD on Cisco Nexus 9000 with OSPF, EIGRP and BGP: feature bfd, timer tuning, multihop sessions, syslog down reasons and ethana

admin 2026-08-23

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Troubleshoot Cisco IOS XR link bundles step by step: LACP config, member distribution issues, MLAG with ICCP and BFD over bundle members with real

admin 2026-08-23

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Troubleshoot interface CRC errors on Cisco IOS XR routers — common causes, verification with show commands, and proven fixes for degraded links.

admin 2026-08-22

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Diagnose and fix input drops on Cisco IOS XR routers. Learn root causes, show commands for verification, and step-by-step troubleshooting procedures.

admin 2026-08-22

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标签：troubleshooting