LOG 归档 - 第86页共139页

Linux tc netem: Simulate Latency, Packet Loss and Jitter

Simulate latency, jitter, packet loss, corruption and reordering on Linux with tc netem, scope the impairment to one flow, then verify and clean up.

admin 2026-09-04

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OSPF Area Types: Stub, Totally Stubby and NSSA

OSPF area types explained: stub, totally stubby, NSSA and totally NSSA, with LSA filtering rules, comparison tables and Cisco configuration commands.

admin 2026-09-04

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Cisco ASA CLI Basics: Modes, Interfaces, ACLs and NAT

Cisco ASA CLI from console to production: modes, nameif and security levels, object NAT, ACLs, SSH, failover, site-to-site VPN and a checklist.

admin 2026-09-04

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Cisco EEM Applets: Automate with event syslog Triggers

Automate Cisco IOS responses with Embedded Event Manager applets: syslog, SNMP and timer triggers, CLI actions, alerting, testing and production-safe

admin 2026-09-04

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Cisco IP Helper-Address: DHCP Relay Configuration

Cisco IOS DHCP relay with ip helper-address: forward client broadcasts to a central DHCP server across VLANs, add multiple servers and verify the rela

admin 2026-09-04

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Wireshark Capture Filters vs Display Filters Explained

Wireshark capture filters (BPF) versus display filters (DFL) explained: grammar, syntax, performance trade-offs, common mistakes and the workflow for

admin 2026-09-04

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Junos Storm Control Configuration for BUM Traffic

Protect Junos EX and QFX switches from storms: configure storm control profiles, bandwidth levels, shutdown and autorecovery actions, plus verificatio

admin 2026-09-04

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MikroTik RouterOS Bridge VLAN Filtering Configuration

MikroTik RouterOS bridge VLAN filtering explained: PVIDs, the bridge VLAN table, native VLAN trunks, management VLANs, lockout recovery and verificati

admin 2026-09-04

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华为交换机 SSH/STelnet 远程登录配置教程（含 RSA 密钥）

华为交换机/路由器 SSH（STelnet）远程登录配置完整教程：从使能 STelnet 服务、生成 RSA 密钥对、创建 AAA 本地用户、配置 VTY 认证与入站协议，到 RSA 公钥免密登录、服务器参数调优、ACL 登录源限制及常见故障排查。

admin 2026-09-04

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Cisco DHCP Snooping: Trusted and Untrusted Ports

Cisco DHCP snooping: enable it per VLAN, trust server ports, rate-limit starvation floods, persist the binding database and verify with show commands.

admin 2026-09-04

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