Tuesday, August 9, 2016

Opengear and the Evolution and Consolidation of Network Devices

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Opengear at Tech Field Day Extra 2016 I recently attended Cisco Live 2016 in Las Vegas and was invited to attend Tech Field Day Extra as...
Friday, February 5, 2016

Configuring ERSPAN on Cisco Routers and Switches

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In two recent posts, I covered SPAN , for mirroring traffic to a port on a local switch, and RSPAN , for mirroring traffic across a VLAN to ...
3 comments:
Saturday, January 30, 2016

Configuring RSPAN on Cisco Catalyst Switches

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I recently wrote a post on configuring port mirroring (SPAN) on Cisco Catalyst switches .  SPAN (switched port analyzer) allows you to mirro...
2 comments:
Thursday, January 28, 2016

Configuring Port Mirroring (SPAN) on Cisco Catalyst Switches

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So you have a network issue.  Or perhaps you don't, but you need to help find the root cause of a performance issue and conclusively sho...
Wednesday, April 8, 2015

vMotion Fails - Failed to connect to remote host. Network unreachable.

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When migrating a VM using vMotion, the migration may stall at 14% and eventually fail with the following error: Migration [xxxx:xxxx] fail...
Tuesday, March 31, 2015

ASA Remote Access User Prevent SSH Access

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When configuring a remote access VPN on an ASA, there are times when an external authentication server (RADIUS, TACACS+, etc) is not availab...
Saturday, January 10, 2015

Choosing an ExtremeXOS Software Release

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When updating ExtremeXOS, it is important to choose your software release carefully.  The newest builds may contain new features that are no...