Why can iBGP peer over loopbacks if BGP is not running yet? This article explains the underlay dependency, why OSPF is optional, how loopback-based sessions can survive link failure, and why BGP Established does not prove application traffic is healthy.
Engineer Lab
2 Blog found
Phased 1G-to-10G Network Upgrade: How to Avoid Replacing the Access Layer Twice
A real office expansion raised a common network-refresh problem: the core is still limited to 1G, but new switches and fiber are being installed today. This article explains how to stage the move to 10G, when LAG can help, how to compare OM3 and single-mode, and which infrastructure is worth future-proofing now.