BDF is listed in the CCIE Data Center Lab Blueprint as, “1.2.c – Implement BFD for dynamic routing protocols”. In this blog post, I’ll be explaining BFD and going over it’s relevance for dynamic routing protocols. Without further ado.
Bidirectional Forwarding Detection (BFD) is a protocol designed to quickly detect failures in the forwarding-path, and notify the configured protocols (OSPF, EIGRP, BGP, HSRP, etc) immediately, before they’ve even had an opportunity to be aware of the failure themselves. This results in expedited, sub-second detection of failed forwarding-paths, leading to quicker convergence. (more…)
This post is a part of my CCIE:DC studies, but will be useful for anyone needing to quickly configure NetFlow in NXOS. For CCIE:DC purposes, an understanding of how NetFlow is configured in NXOS cannot hurt, especially since it is mentioned in the blueprint (1.5.b – Implement Netflow). (more…)
If you’re in a company that uses Nexus 5Ks to run both LAN and SAN, and for some strange reason your SAN Administrator wants access to the 5Ks for zoning, just deny it. Okay, okay, I guess that won’t fly, so let’s configure role-based access control (RBAC) to lock down what the SAN Administrator has access to.
Good thing about Nexus 5K is there is a built-in role called san-admin that we can use for this purpose. Let’s take a look at the role privileges:
Nexus 7000 has it’s system jumbo mtu set to 9216 by default. Even though system MTU is set, notice the interface MTU:
N7K-1# sh run all | i mtu
system jumbomtu 9216
N7K-1# sh int e3/7 | i MTU
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec