troubleshooting 归档 - 第20页 共26页 - 夜莺博客

标签：troubleshooting

tcpdump Packet Capture Guide: BPF Filters and Troubleshooting

tcpdump Packet Capture Guide: BPF Filters and Troubleshooting

tcpdump guide: BPF filter syntax for hosts, ports and flags, numeric output, ring-buffer captures and the packet-level scenarios that diagnose outages

admin admin 2026-08-27
0 0 0
OSPF Neighbor Stuck in INIT State: FortiGate Troubleshooting

OSPF Neighbor Stuck in INIT State: FortiGate Troubleshooting

OSPF stuck in INIT on FortiGate: HELLO packets not received, MTU mismatch, one-way multicast drops and auth issues, with ospf interface and sniffer ch

admin admin 2026-08-27
0 0 0
Diagnosing HPE 3PAR Storage Issues in a VMware Environment

Diagnosing HPE 3PAR Storage Issues in a VMware Environment

Structured HPE 3PAR troubleshooting for VMware: per-LUN latency, multipathing and PSP checks, thin provisioning, UNMAP reclaim and firmware validation

admin admin 2026-08-27
0 0 0
NetApp ONTAP Space Usage: Where Did the Aggregate Space Go?

NetApp ONTAP Space Usage: Where Did the Aggregate Space Go?

NetApp ONTAP space questions answered: right-sized disks, WAFL 5-10% reserve, spares, Flash Pool cache and volume guarantees, plus how to reclaim spac

admin admin 2026-08-27
0 0 0
NetApp ONTAP Dedup Fails with 'Not Enough Disk Space' — Explained

NetApp ONTAP Dedup Fails with 'Not Enough Disk Space' — Explained

Why ONTAP dedupe fails with 'Not enough disk space' when the aggregate looks free: the 3%+4% metadata reserve rule, sis.log analysis, and how to recla

admin admin 2026-08-27
0 0 0
Junos Troubleshooting: A LAN Where Static Hosts Never Answer

Junos Troubleshooting: A LAN Where Static Hosts Never Answer

A real-world Junos debugging story: an SRX sees hosts in the ethernet-switching table but not in ARP. Follow the hunt through irb and routing-instance

admin admin 2026-08-27
0 0 0
Troubleshoot MAC Flaps and Layer 2 Loops on Catalyst Switches

Troubleshoot MAC Flaps and Layer 2 Loops on Catalyst Switches

Fix MAC flapping on Cisco Catalyst switches: read %SW_MATM-4-MACFLAP_NOTIF logs, trace the flapping MAC hop by hop, and apply UDLD and storm control.

admin admin 2026-08-27
0 0 0
Troubleshoot STP Issues on Cisco Catalyst Switches

Troubleshoot STP Issues on Cisco Catalyst Switches

Diagnose Cisco Catalyst STP loops and flooding: locate the loop, check BPDU loss and duplex mismatches, then harden with BPDU Guard, Root Guard and UD

admin admin 2026-08-27
0 0 0
华为CE交换机配置误删或错误后如何快速回滚

华为CE交换机配置误删或错误后如何快速回滚

华为CE交换机配置回滚实战：误删配置后用 display configuration commit changes 确认 Commit ID，再用 rollback configuration to commit-id 一键恢复，附回滚失败原因、按时间点回滚与割接基线清单。

admin admin 2026-08-27
0 0 0
Automating ArubaOS-CX Switches with the REST API and Postman

Automating ArubaOS-CX Switches with the REST API and Postman

ArubaOS-CX REST API and Postman walkthrough: enable the REST server, log in, read interfaces and VLANs, upload a full config, and automate with Newman

admin admin 2026-08-27
0 0 0
1 … 18 19 20 21 22 … 26