nanog mailing list archives
Re: Common operational misconceptions
From: Jack Bates <jbates () brightok net>
Date: Wed, 15 Feb 2012 19:20:38 -0600
A few for me that come to mind which haven't been covered yet.*) Latency, jitter, etc when pinging a router means packets going through the router suffer the same fate.
Never fails that I get a call about the latency changes that occur every 60 seconds, especially on software based routers. uh, huh.
*) admin/admin is okay in a private network behind a firewall Oh, look, a console port!*) Assign arbitrary MTUs in a layer 2 transport network based on exactly what customers order.
*) MTU/packet/frame/ping size means the same thing on all vendors.*) If Wireshark looks right, it must be right (unless Windows discarded 1 (and only 1) layer of 802.1q tags)
*) Upgrades should always be done, even when there's no relevant security or functionality that is needed in newer code.
Amazing how many code changes break things which don't necessarily show up in test environments but will show in production networks (Your mpls worked for months with an invalid router-id configured, and then broke when you change codes? DHCP worked fine, but after upgrade quit accepting <300 byte DHCP packets?).
Jack
Current thread:
- Common operational misconceptions John Kristoff (Feb 15)
- Re: Common operational misconceptions -Hammer- (Feb 15)
- RE: Common operational misconceptions Kenneth M. Chipps Ph.D. (Feb 15)
- Re: Common operational misconceptions Mark Grigsby (Feb 15)
- Re: Common operational misconceptions Jens Link (Feb 17)
- Re: Common operational misconceptions Mark Grigsby (Feb 15)
- Re: Common operational misconceptions Dan White (Feb 15)
- Re: Common operational misconceptions -Hammer- (Feb 15)
- Re: Common operational misconceptions Jack Bates (Feb 15)
- Re: Common operational misconceptions -Hammer- (Feb 15)
- Re: Common operational misconceptions Mathias Wolkert (Feb 15)
- Re: Common operational misconceptions Jens Link (Feb 17)
- Re: Common operational misconceptions Sven Olaf Kamphuis (Feb 17)
- Re: Common operational misconceptions Jared Mauch (Feb 17)
- Re: Common operational misconceptions Jens Link (Feb 17)
- Re: Common operational misconceptions Leo Bicknell (Feb 15)
- Re: Common operational misconceptions Doug Barton (Feb 15)
- Re: Common operational misconceptions Mark Andrews (Feb 15)
- Re: Common operational misconceptions Doug Barton (Feb 15)
- Re: Common operational misconceptions Chuck Anderson (Feb 15)
- Re: Common operational misconceptions Carsten Bormann (Feb 15)
- Re: Common operational misconceptions Mike Lyon (Feb 15)
- Re: Common operational misconceptions Carsten Bormann (Feb 15)