asterisk users - May 2006 - Failing SIP registration brings * down

Hi there,

this is now the second time I've seen an issue like this with 1.2.7.1, 
the first time it was a DNS hickup, today its some Internet congestion: 

When one (!) or more register statements in sip.conf fail the entire 
Asterisk becomes very unresponsive and does not accept registrations from 

local phones. This is bad because I could live with being temporarily 
unreachable thru my SIP carrier, but the local phones should not be 
affected (and therefore still work with BRI and internally).

There's masses of these to be seen (btw DNS and ping work) on the CLI:

chan_sip.c:5322 sip_reg_timeout:    -- Registration for 'xxx@yyy.zz' 
timed out, trying again (Attempt #24)

Question: Wasn't there a new sip.conf entry introduced recently that 
limited registration attempts to, say, 5 tries? I can't find any 
reference to this, and am not sure if this made it into 1.2.

Cheers, Philipp