Tag: routing

Reliable Static Routing

Here’s a scenario I ran into long ago. We had several sites that had a frame relay link back to headquarters and a DSL line. Each link was terminated into a different router on a flat LAN with the users.…

BGP Route-reflectors

If you’re running iBGP, you may have run across this. What if you had three routers — R0, R1, R2 — that were running BGP under the same ASN, but R1 and R2 weren’t peered? Any routes coming from R1…

EIGRP Basics

I realized the other day that I haven’t mentioned EIGRP once. As a Cisco guy, I think I’m required to do at least one article on it, so here it goes. Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco-proprietary…

HSRP vs. GLBP

HSRP (Hot Standby Router Protocol) is a Cisco-proprietary method for supplying a highly-available gateway for hosts to use. GLBP (Gateway Load Balancing Protocol) does the same thing. So, what’s the difference? HSRP works on layer 3 and provides a standby…