Re: [nsp] Content Switch GSLB caching issues ?

From: Stephen Sprunk (ssprunk@cisco.com)
Date: Mon Jan 14 2002 - 00:49:43 EST


Thus spake "Edward S. Desouza" <edward_desouza@yahoo.com>
> this question is with regards to Cisco's content
> switch series ( CSS11150 etc.. ). If I understand
> right, when doing GSLB, each of the Content Switches
> are configured as Authoritative for the domain for
> which gslb needs to be provisioned.
> Doesnt this lead to DNS caching issues , resulting
> in failover time from one PoP to another PoP take
> exceeding long intervals of time ? I know that by
> reducing ttl in DNS, I can circumvent the problem, but
> doesnt this put too much load on the content Switch ?

DNS-based load balancing hacks normally set the TTL to expire immediately.
It does cause increased DNS load on those devices, but that's what they're
there for.

S



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