job screening question

Sat Jul 7 04:01:51 UTC 2012

On 7/7/12 1:24 AM, "Jared Mauch" <jared at puck.nether.net> wrote:

>Die proxy arp die. (and that's not German).
>
>I've had a job or consulting gig or two that has inadvertently had this
>as the hidden glue making things work.
>
>(wha, you can't route that subnet out an Ethernet interface without a
>next hop? It's always worked....)
>
>I fight with sysadmins to this day about the concept of a broadcast
>domain and subnet... If I hear another case of someone saying that switch
>is the "80" subnet when there are 3 co-existing /24s in that domain I may
>go crazy....
>
>I've cleaned up a lot of poor host and network management and it's
>amazing how much a difference the hardware operates without the hacks.
>
>Jared Mauch
>
>On Jul 6, 2012, at 8:51 PM, Ben Aitchison <ben at meh.net.nz> wrote:
>
>> Routing loops, incorrect
>> subnet masks.  (like when people stick a /24 netmask on a /27 then
>>can't reach another
>> adjacent /27)
>

>We had a pair of diversely located systems operate for about 18 months
>with misconfigured gateway addresses. Proxy ARP kept everything on an
>even keel until one of the systems failed and the traffic routed to the
>remaining system. I arrived on the call in time to hear the sys admins
>saying that they had exceeded the maximum number of ARP entries and were
>going to expand the table :(