routers using auto summary with classless protocols (ie eigrp) don't generate a black hole, even when they have discontiguous IP networks. Instead, they summarize the two discontiguous networks, advertise a much larger route to the rest of the netwo...

What are the pros and cons to using stp when vtp pruning is in effect?I had a problem with a trunk using FastEtherChannel. Due to a speed/duplex setting mismatch, it became a layer 2 loop, and caused a broadcast storm. Is this the type of thing tha...

When I run a proxy server inside the firewall, how does that affect the firewall rules?

I have a vlan firewalled by a pix. The pix is the default gateway.I will need to route between two private IP address spaces. Can I connect a router with igrp enabled, for example, but not configured as the default gateway? Is proxy arp on the rou...

I need to know the capabilities of the E0 interface on the PIX 515E. Is it possible to NAT into two separate private IP address spaces for the internal network, and can I also enable RIP, for instance, and route between two IP networks on the intern...