Switch to TCP... This is why the RFCs tell you to support both UDP and TCP for SIP... On 1/9/13 9:36 AM, "Tim St. Pierre" <fs-list@communicatefreely.net> wrote:
Hello,
I'm having a problem with BLF in some cases, and I found that the length of the username was a factor in whether the lamps worked or not.
When I did some packet captures, I found that problem packets were 1500 bytes or so. Since the endpoint is on a DSL line that has an MTU of 1460, the packet doesn't fit.
I'm already using compressed headers. Is there a way to reduce the packet size more, or is there another solution? I will include an example below: Note that my IP address and domain substutions may change the packet size a little, but the point is the same.
Thanks!
NOTIFY sip:XXXX@YYY.YYY.YYY.YYY:5060;transport=udp SIP/2.0 v:SIP/2.0/UDP zzz.zzz.zzz.zzz:5070;rport;branch=z9hG4bKD5QUr5m2Fm3Dp Route:<sip:aaa.aaa.aaa.aaa:61906>;transport=udp Max-Forwards:70 f:<sip:accountcode-701@ourdomain.com>;tag=TrmHE4FBIrB4 t:"Tim St. Pierre"<sip:XXXX@ourdomain.com>;tag=ecc2498bfd i:3decd12decccafe1 CSeq:448376002 NOTIFY m:<sip:accountcode-701@xxx.xxx.xxx.xxx:5070;transport=udp;fs_nat=yes;fs_path=s ip:yyy.yyy.yyy.yyy:61906%3Btransport%3Dudp> User-Agent:Communicate Freely 2.0 Allow:INVITE,ACK,BYE,CANCEL,OPTIONS,MESSAGE,INFO,UPDATE,REGISTER,REFER,NOTIFY, PUBLISH,SUBSCRIBE k:timer,precondition,path,replaces o:dialog u:talk,hold,conference,presence,dialog,line-seize,call-info,sla,include-sessio n-description,presence.winfo,message-summary,refer Subscription-State:active;expires=1137 c:application/dialog-info+xml l:639
<?xml version="1.0"?> <dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="477" state="partial" entity="sip:accountcode-701@ourdomain.com"> <dialog id="accountcode-701" direction="initiator"> <state>confirmed</state> <local> <identity display="park">sip:accountcode-701@ourdomain.com;proto=park</identity> <target uri="sip:accountcode-701@ourdomain.com;proto=park"> <param pname="+sip.rendering" pvalue="no"/> </target> </local> <remote> <identity display="park">sip:accountcode-701</identity> <target
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