Monthly Archives: July 2011

Inter-VLAN routing on a Cisco ASA with same security interfaces

The Problem: You’re setting up inter-VLAN routing on your Cisco ASA firewall¬† (5510, et al) using sub-interfaces.¬† There should be no restrictions on what traffic can flow where between the internal VLANs, so you’ve set the same security level on … Continue reading

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Trunk connection problems between ASA firewall and Cisco switch

The Problem: You’ve set up a trunk link between a Cisco ASA firewall (5505, 5510, et al) and a Cisco switch (2960, 3560, et al). However, you’re not able to establish a connection between them at either Layer 2 or … Continue reading

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