[j-nsp] slow telnet session
jesper at skriver.dk
Wed May 28 19:23:13 EDT 2003
On Wed, May 28, 2003 at 11:09:04AM -0500, John Kristoff wrote:
> However, I have noticed some initial slowdown in the login process.
> For example, when large amounts of UDP traffic arrive on a gig
> interface (say 100 Mb/s or more) and its rate-limited on ingress to
> something much less (say about 10 Mb/s), the processor goes to about
> 50% and stays there until the traffic subsides to somewhere below the
> rate limit threshold.
> Once logged in, response time is fine, but in my experience the
> initial connection lag is noticeable.
If your DNS response traffic come in over the same interface, and you
rate limit all UDP traffic, you will drop 9 out of 10 DNS response
packets, which will obviously delay your login, as it waits for a DNS
Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456
One Unix to rule them all, One Resolver to find them,
One IP to bring them all and in the zone to bind them.
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