innerslaughter.org

... is done. I must admit, it was easier than expected, but that's probably because its only a pre-qualifying exam. Time to really buckle down and focus on the labs.

This lab builds on the previous (L3 VPN) setup, it still has a four-router provider network, and two customers with two sites with one router each. This time the provider core routers are sharing a FastEthernet link, and the CE routers are connected to PE routers (which have been renamed) through Frame Relay, the lab also uses two Frame Relay switches. The routers are using the same IOS images as before.

This is how everything is connected on a physical layer:
- P1 f0/0 is connected to P2 f0/0
- P1 f1/0 is connected to PE3 f0/0
- P1 f1/1 is connected to PE4 f0/1
- P2 f1/0 is connected to PE4 f0/0
- P2 f1/1 is connected to PE3 f0/1
- PE3 s1/0 is connected to FR1 port 3
- PE4 s1/0 is connected to FR2 port 3
- CE1-1 s0/0 is connected to FR1 port 11 (64 kbps)
- CE2-1 s0/0 is connected to FR1 port 12 (64 kbps)
- CE1-2 s0/0 is connected to FR2 port 11 (64 kbps)
- CE2-2 s0/0 is connected to FR2 port 12 (64 kbps)

This article will describe in detail setting up a simple site-to-site Layer 3 MPLS VPN in Dynamips/GNS3 for two customers with two sites each.

The lab uses 8 routers in total:
- 4 x 7200, P1 and P2 core routers, PE1 and PE2 edge routers, all running the c7200-pk9u2-mz.124-17.bin image
- 4 x 3620, CE1-1 and CE1-2 as the first customer's sites, CE2-1 and CE2-2 as the second customer's sites, all running the c3620-j1s3-mz.123-21.bin image

This is how they are connected:
- P1 f0/0 is connected to PE1 f0/0
- P1 f0/1 is connected to PE2 f0/1
- P2 f0/0 is connected to PE2 f0/0
- P2 f0/1 is connected to PE1 f0/1
- CE1-1 s0/0 (DTE) is connected to PE1 (DCE) s1/0 at 64kbps
- CE2-1 s0/0 (DTE) is connected to PE1 (DCE) s1/1 at 64kbps
- CE1-2 s0/0 (DTE) is connected to PE2 (DCE) s1/0 at 64kbps
- CE2-2 s0/0 (DTE) is connected to PE2 (DCE) s1/1 at 64kbps

...required reading for anybody calling themselves a network administrator/engineer:

- RFC 1925: The Twelve Networking Truths (this one is actually serious)
- RFC 1217: Memo from the Consortium for Slow Commotion Research (CSCR)
- RFC 2549: IP over Avian Carriers with Quality of Service