cisco.com has this to say about mixing AC and DC power supplies in the
7206:
Caution Do not mix power supplies in the Cisco 7206. In dual power supply
router configurations, both power supplies must be of the same type (two
AC-input power supplies or two DC-input power supplies).
I've seen posts from people saying that they have mixed AC & DC in 7206's
with both types powered up at the same time...and nothing bad happening.
Can anyone say why cisco cautions against doing this? Is it just a
grounding issue (possibly very different grounds provided by the AC power
and rack's ground (used when using DC power)?
If it's just that, I would think that if the measured voltage between AC
ground and rack ground is close to 0v, then this might be safe to do,
especially as a short term situation while migrating from one type of
power to the other.
----------------------------------------------------------------------
Jon Lewis | I route
Senior Network Engineer | therefore you are
Atlantic Net |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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