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Cisco Nexus 9000 VXLAN BGP EVPN Fabric Design Guide

Design a Cisco Nexus 9000 VXLAN BGP EVPN fabric: 3-stage and 5-stage CLOS, leaf roles, spine route reflectors, underlay choice and IP addressing plan.

admin 2026-08-28

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Cisco VLAN and Inter-VLAN Routing Configuration Guide

Configure VLANs, access ports, 802.1Q trunks and SVIs for inter-VLAN routing on Cisco Catalyst switches, with DHCP relay, troubleshooting steps and ha

admin 2026-08-28

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Cisco to Arista EOS Migration Cheat Sheet

Cisco IOS to Arista EOS command cheat sheet: system, VLAN, routing, HSRP-to-VRRP, AAA and logging equivalents, plus the architecture differences that

admin 2026-08-28

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Cisco OSPF Neighbor Troubleshooting: States and Fixes

Cisco OSPF neighbor troubleshooting state by state: the full adjacency state machine, HELLO fields that must match, MTU, timer and authentication fail

admin 2026-08-28

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Cisco Nexus vPC Failover Scenarios and Troubleshooting Checklist

Nexus vPC failover explained: how peer-link loss, keepalive failure and peer death change port states, plus Type-1 checks and show vpc verification ch

admin 2026-08-27

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Multi-Vendor Network CLI Cheat Sheet: IOS XR, Junos, SR OS, VRP

Scenario-based multi-vendor cheat sheet for Cisco IOS XR, Junos, Nokia SR OS and Huawei VRP: configure, verify and troubleshoot links, BGP, VLAN and e

admin 2026-08-27

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VXLAN with MP-BGP EVPN Control Plane: Design and Configuration

MP-BGP EVPN replaces flood-and-learn VXLAN: EVPN route types, underlay MTU, symmetric IRB, distributed anycast gateway, ARP suppression and Nexus 9000

admin 2026-08-27

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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 2026-08-27

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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 2026-08-27

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Ansible Network Examples: Facts, Backups and CLI

Ansible network automation examples: collect facts from EOS, IOS and VyOS, back up switch configs, and run platform-independent cli_command tasks.

admin 2026-08-26

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标签：cisco