Category Archives: Cisco

AnyConnect 4.6 Released – Download Here

Cisco has released Cisco AnyConnect 4.6. Feel free to download it below. While I no longer work with Cisco gear as my primary job and have moved to the AWS/DevOps side of IT, I still have access to the AnyConnect images for the time being. I don’t know how long this will last, but i’ll… Read More »

Configuring MPLS L2 – Base/lab config

This example is how to configure basic Layer 2 MPLS connectivity across your MPLS core, so CE endpoints, or in some cases, ToR switches can appear to be layer 2 adjacent, through your core.  This is primarily used on the service provider side but has amazing uses for the data center end of things.  Being… Read More »

OSPF Neighbor Relationships

In this post, we will discuss the components involved with OSPF Neighbor Relationships.  This is not a configuration guide but should be used as a reference for various OSPF states and concepts that the OSPF protocol goes through to establish connections to its neighbors. Determine your own Router ID.  The router ID identifies the router… Read More »

OSPF Area Design and Terms

Here are some core concepts that go into understanding OSPF.  This is the number one IGRP in the world so it worth taking time to understand a few of these fundamental principles. The three tables used are the Neighbor table, the Topology table, and the Routing table. All routers must connect to Area 0.  Routers… Read More »

AnyConnect 4.5

Hi all, I have not utilized this blog in a long time.  My career has advanced to a point where I am working with primarily CCNP/CCIE level technology and automation with Python (Networking/DevOps).  I will begin posting more as I continue my studies in this area.  In the meantime, allow me to start up this… Read More »

Category: VPN

AnyConnect 4.0 Released

The latest AnyConnect clients have been released from Cisco, version 4.0.00048.   The following Operating Systems are no longer supported in this latest release, so be careful before downloading or deploying these: Windows Vista and XP Mac OS X 10.6 Ubuntu 9, 10, 11 RHEL 5.x All Linux 32-bit platforms— As of AnyConnect 4.0, Linux… Read More »

Exploring vPCs and their verification

Virtual Port Channels (vPCs) allow you to ether channel or bundle multiple ports to the different devices.  Since the 7k/5k devices are looked at as one big virtual device, you can now use ether channel or load balancing and redundancy between multiple Nexus switches. vPC Peers are the bundled devices that act as one single… Read More »

Using ACLs in NX-OS

As usual, the same guidelines apply: You need at least one permit since there is always an implicit deny. The order matters. The global lists are first created then need to be assigned to a purpose. They will either recognize traffic and let it serve the purpose or prevent it from serving its purpose. One… Read More »

Routing in the Data Center

Types of Routes: Direct Route – Directly attached to the router interface. Static Route – Used to tell your router statically where to direct traffic: ip route 10.10.30.0/24 10.10.10.100 Meaning 10.10.30.0/24 can be reached via 10.10.10.100.  This can be confirmed by viewing the routing table with: show ip route Dynamic Route – Determined using a… Read More »

NX-OS – Layer 2 Redudancy

Layer 2 redundancy protocols exist to prevent loops from broadcasts and do so using BPDU packets.  These protocols include: STP – Spanning Tree Protocol – 802.1D RSTP – Rapid Spanning Tree Protocol – 802.1W MSTP – Multiple Spanning Tree Protocol  – 802.1S LAN Port Channeling – Also known as EtherChannels to bind multiple ports together.… Read More »