One of the Expert Express sessions focused on an MPLS/VPN-based WAN network using OSPF as the routing protocol. The customer wanted to add ...
Showing posts with label OSPF. Show all posts
Showing posts with label OSPF. Show all posts
Routing Protocols on NSX Edge Services Router
VMware gave me early access to NSX hands-on lab a few days prior to VMworld 2013. The lab was meant to demonstrate the basics of NSX, from ...
Implementing Control-Plane Protocols with OpenFlow
The true OpenFlow zealots would love you to believe that you can drop whatever you’ve been doing before and replace it with a clean-slate so...
Inter-Process OSPF Route Selection Rules
Nicolas Michel left an interesting comment (quoting Cisco’s documentation ) on my OSPF Route Selection Rules blog post: … The OSPF route s...
WAN Routing in Data Centers with Layer-2 DCI
A while ago I got an interesting question: Let's say that due to circumstances outside of your control, you must have stretched data cen...
Change in OSPF Designated Router creates extra network LSAs
When testing the OSPF graceful shutdown feature, I've encountered an interesting OSPF feature: if you force a change in LAN DR router (o...
Prefix-Independent Convergence (PIC): Fixing the FIB bottleneck
Did you rush to try OSPF Loop Free Alternate on a Cisco 7200 after reading my LFA blog post ... and disappointedly discovered that it only ...
Loop-Free Alternate: OSPF meets EIGRP
Assume we have a simple triangular network: Now imagine the A-to-C link fails. How will OSPF react to the link failure as compared to EIGRP?...
Redundant DMVPN designs, Part 1 (The Basics)
Most of the DMVPN-related questions I get are a variant of the “ how many tunnels/hubs/interfaces/areas do I need for a redundant DMVPN desi...