[AusNOG] Outage that costs Millions

[Dobbins, Roland]

On Jun 30, 2010, at 9:47 AM, Lincoln Dale wrote:

> its an edge feature.  i.e. use it on edge ports that don't participate in STP. :)

Examples are the host access edge, IDC uplinks to core/upstream, service switch access ports, and so forth.

Additional layer-2 BCPs include loop guard & root guard & UDLD & spantree portfast, along with IP source guard, DHCP snooping (works for statically-addressed hosts, too), port security, pVLANs, PACLs, & VACLs. Anyone running an Ethernet infrastructure should bone up on these features and apply them in a situationally-appropriate manner.

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Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>

    Injustice is relatively easy to bear; what stings is justice.

                        -- H.L. Mencken