[SIPForum-discussion] SIP Glare

Chris Nicholson Chris.Nicholson at syniverse.com
Tue Jun 7 16:16:34 UTC 2011

Hi K,

Glare occurs when two endpoints, party a and party b, send a re-invite to each other at about the same time.  So, from the perspective of party a, it has just sent a re-invite to party b and instead of receiving a 1xx or other response message it gets a re-invite, causing it to not know how to proceed.  As an example, both parties might invite each other, simultaneously to a conference center.  Or another example, both endpoints, involved in a voice call, might invite each other to a video call.  This is described in RFC 3261 under re-invite, including what the endpoints should do.


From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of K Satyadarshi
Sent: Saturday, June 04, 2011 2:39 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] SIP Glare

Hi Forum,

Can anyone tell about the glare in SIP. How does it get created ? What is the scenario in this case.

K Satyadarshi
Email: satyadarshi28 at gmail.com<mailto:satyadarshi28 at gmail.com>
Cell:   +91-9449112443

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