[cisco-voip] testing new ACLs: VG224 issues

[Wes Sisk]

udp w.x.y.z(19441) -> i.j.k.l(4001)

router tries to sent phone RTCP.  phones do not support RTCP.

icmp a.b.c.d -> i.j.k.l 

are you positive on this direction and the explanations of addresses?  It would fit better for this to be the ICMP port unreachable coming from the phone back to the router.

/wes

On Dec 1, 2011, at 4:23 PM, Lelio Fulgenzi wrote:

So the VG224 is trying to connect to to the IP phone to do RTCP?

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it. 
                              - LFJ (with apologies to Mr. Popeil)


From: "Wes Sisk" <wsisk at cisco.com>
To: "Lelio Fulgenzi" <lelio at uoguelph.ca>
Cc: "Cisco VoIPoE List" <cisco-voip at puck.nether.net>
Sent: Thursday, December 1, 2011 4:20:51 PM
Subject: Re: [cisco-voip] testing new ACLs: VG224 issues

CM does and phones do not do RTCP.  However, it looks like CUCM may default the RTCP port to 4001 during some capabilities and port exchanges.

On Dec 1, 2011, at 3:46 PM, Lelio Fulgenzi wrote:

What is UDP traffic destined to 4001 all about?



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