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Cisco IOS NTP Configuration: Server and Source Interface

Cisco IOS NTP configuration guide: server and prefer, source interface, authentication, access groups, verification and troubleshooting unsynchronized

admin 2026-09-07

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Cisco IOS XR RPL Route Policy: prefix-set Examples

Understand IOS XR RPL: build prefix-sets with ge/le operators and route-policies to filter BGP routes on ASR 9000, with examples and show rpl verifica

admin 2026-09-07

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Cisco IOS XR Commit Replace and Rollback Configuration

Use commit replace to wipe or rebuild the IOS XR running configuration, and roll back to any labeled commit on ASR 9000, NCS and 8000 routers safely.

admin 2026-09-07

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Cisco IOS Password Recovery: config-register 0x2142 Method

Cisco IOS password recovery with config-register 0x2142: break to ROMMON, confreg, restore startup-config, reset credentials and register.

admin 2026-09-06

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BGP Communities: Well-Known Values and Cisco Configuration

BGP communities on Cisco IOS: well-known values, standard vs extended vs large, send-community, route-map set and match, verification and common mista

admin 2026-09-06

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IS-IS on Cisco IOS: NET Address, Levels and Configuration

Configure IS-IS on Cisco IOS: NET address structure, level-1 and level-2 adjacency rules, ip router isis, metric-style wide and a two-area example.

admin 2026-09-06

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Cisco IOS DHCP Server: Pools, Exclusions and Options

Cisco IOS DHCP server setup: global excluded-address ranges, pool options, DNS and lease settings, static manual bindings, split scopes and verificati

admin 2026-09-06

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SNMPv3 Configuration on Cisco IOS and Junos: authPriv Setup

Configure SNMPv3 authPriv on Cisco IOS and Juniper Junos: security levels, USM users, views, VACM access, engine IDs and snmpwalk verification command

admin 2026-09-06

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Cisco Prefix-List and Route-Map Filtering for BGP

Filter BGP routes with Cisco prefix-lists and route-maps: ge/le prefix matching, sequence logic, bogon filters and safe deny/permit patterns.

admin 2026-09-05

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RSTP vs MSTP: Convergence, Instances and Migration

Compare RSTP and MSTP: convergence, port roles, MST regions and instances, with Cisco configuration, verification and a phased migration plan.

admin 2026-09-05

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标签：cisco