[c-nsp] list wisdom please, Cisco switches

Nick Hilliard nick at foobar.org
Tue Jan 15 17:09:06 EST 2013


On 15/01/2013 19:43, Blake Dunlap wrote:
> Yeah that's the reason. Its not about talking to one another, its about
> protecting from attacks that could allow snooping on traffic flows, to
> hijacking.

This is mildly troublesome.  What you really want in your switch is:

- dhcp option 82 support
- dhcp snooping
- DAI
- port security
- urpf on first hop
- RA guard / dhcpv6 snooping / ND guard if you're providing ipv6
- broadcast / multicast storm control
- lan broadcast segmentation for session hijack protection
- common L2 domain for public IP address assignment efficiency

note that the last two cannot easily be achieved without per-port dhcp
filtering.

Nick



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