Tagged articles

Network Failover

2 articles · Page 1 of 1

Dec 22, 2020 · Operations

Analysis of ARP Cache Behavior and Failover Issues in a Dual‑Firewall Environment

This article details a network outage caused by ARP cache state transitions, neighbor reachability detection differences between Linux 6.0/7.0, Cisco NXOS ARP timeout, and keepalived standby handling, explaining how these factors led to traffic disruption and the eventual root‑cause resolution.

Cisco NXOSKeepalivedLinux

0 likes · 11 min read

Analysis of ARP Cache Behavior and Failover Issues in a Dual‑Firewall Environment

Open Source Linux

May 5, 2020 · Operations

Mastering Keepalived: How VRRP Powers High‑Availability Load Balancing

Keepalived, a C‑based routing failover tool originally built for LVS, uses the VRRP protocol to provide high‑availability for services like Nginx, HAProxy, and MySQL, managing virtual IPs, health checks, and rapid failover within seconds.

High AvailabilityKeepalivedLVS

0 likes · 6 min read

Mastering Keepalived: How VRRP Powers High‑Availability Load Balancing