Hello Everyone, 
My setup is kamailio as proxy with few boxes of freeswitch in the LAN. Having 
issue with BYE when extensions register on different freeswitch boxes. Here are 
some trace of the call. 
Not sure if this tag= miss match or routing. 

Dispatcher use group 0 with option 4 (round robin). 


client_public_ip.28972 > proxy_public_ip.llrp: [udp sum ok] UDP, length 660 
E....2..5...c....E.\q,.....CBYE sip:mod_sofia@10.18.130.24:5160 SIP/2.0 
Via: SIP/2.0/UDP client_public_ip:28972;branch=z9hG4bK1248337638;rport 
Route: <sip:proxy_public_ip:5084;r2=on;lr=on;ftag=01K2Q1BFa9pKH> 
Route: <sip:10.18.130.27;r2=on;lr=on;ftag=01K2Q1BFa9pKH> 
From: <sip:4300@client_public_ip:28972>;tag=487304085 
To: <sip:4...@sip.company.tld>;tag=01K2Q1BFa9pKH 
Call-ID: 1443c4ad-2085-1235-b5ad-5254003e39bb 
CSeq: 98979026 BYE 
Contact: <sip:4300@client_public_ip:28972> 
Max-Forwards: 70 
Supported: replaces, path, timer, eventlist 
User-Agent: Grandstream Wave 1.2.2 
Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, 
UPDATE, MESSAGE 
Content-Length: 0 


IP (tos 0x10, ttl 64, id 10813, offset 0, flags [none], proto UDP (17), length 
930) 
10.18.130.27.sip > 10.18.130.24.5160: [bad udp cksum 0x1bf7 -> 0xd85c!] UDP, 
length 902 
E...*=..@.4. 
... 
......(....BYE sip:mod_sofia@10.18.130.24:5160 SIP/2.0 
Record-Route: <sip:10.18.130.27;r2=on;lr=on;ftag=487304085> 
Record-Route: <sip:proxy_public_ip:5084;r2=on;lr=on;ftag=487304085> 
Via: SIP/2.0/UDP 
10.18.130.27;branch=z9hG4bKa61.22917bc5fdd65f16e39bf09dcbc7316b.0 
Via: SIP/2.0/UDP 
client_public_ip:28972;received=client_public_ip;branch=z9hG4bK1248337638;rport=28972
 
Route: <sip:proxy_public_ip:5084;r2=on;lr=on;ftag=01K2Q1BFa9pKH> 
Route: <sip:10.18.130.27;r2=on;lr=on;ftag=01K2Q1BFa9pKH> 
From: <sip:4300@client_public_ip:28972>;tag=487304085 
To: <sip:4...@sip.company.tld>;tag=01K2Q1BFa9pKH 
Call-ID: 1443c4ad-2085-1235-b5ad-5254003e39bb 
CSeq: 98979026 BYE 
Contact: <sip:4300@client_public_ip:28972> 
Max-Forwards: 69 
Supported: replaces, path, timer, eventlist 
User-Agent: Grandstream Wave 1.2.2 
Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, 
UPDATE, MESSAGE 
Content-Length: 0 


IP (tos 0x0, ttl 64, id 38202, offset 0, flags [none], proto UDP (17), length 
587) 
10.18.130.24.5160 > 10.18.130.27.sip: [udp sum ok] UDP, length 559 
E..K.:..@... 
... 
....(...7i.SIP/2.0 200 OK 
Via: SIP/2.0/UDP 
10.18.130.27;branch=z9hG4bKa61.22917bc5fdd65f16e39bf09dcbc7316b.0 
Via: SIP/2.0/UDP 
client_public_ip:28972;received=client_public_ip;branch=z9hG4bK1248337638;rport=28972
 
From: <sip:4300@client_public_ip:28972>;tag=487304085 
To: <sip:4...@sip.company.tld>;tag=01K2Q1BFa9pKH 
Call-ID: 1443c4ad-2085-1235-b5ad-5254003e39bb 
CSeq: 98979026 BYE 
User-Agent: FreeSWITCH 
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, 
REFER, NOTIFY, PUBLISH, SUBSCRIBE 
Supported: timer, path, replaces 
Content-Length: 0 


IP (tos 0x10, ttl 64, id 782, offset 0, flags [none], proto UDP (17), length 
503) 
proxy_public_ip.llrp > client_public_ip.28972: [bad udp cksum 0x4c50 -> 
0xd018!] UDP, length 475 
E.......@.+}.E.\c.....q,..LPSIP/2.0 200 OK 
Via: SIP/2.0/UDP 
client_public_ip:28972;received=client_public_ip;branch=z9hG4bK1248337638;rport=28972
 
From: <sip:4300@client_public_ip:28972>;tag=487304085 
To: <sip:4...@sip.company.tld>;tag=01K2Q1BFa9pKH 
Call-ID: 1443c4ad-2085-1235-b5ad-5254003e39bb 
CSeq: 98979026 BYE 
User-Agent: FreeSWITCH 
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, 
REFER, NOTIFY, PUBLISH, SUBSCRIBE 
Supported: timer, path, replaces 
Content-Length: 0 


IP (tos 0x0, ttl 64, id 10584, offset 0, flags [none], proto UDP (17), length 
764) 
10.18.130.26.5160 > 10.18.130.27.sip: [udp sum ok] UDP, length 736 
E...)X..@.6@ 
... 
....(....Y^BYE 
sip:4200@client_public_ip:48147;rinstance=c4084e18f3f39974;alias=client_public_ip~48147~1
 SIP/2.0 
Via: SIP/2.0/UDP 10.18.130.26:5160;rport;branch=z9hG4bK33785247SrX3H 
Route: <sip:10.18.130.27;r2=on;lr=on;ftag=d2e84f4a> 
Route: <sip:proxy_public_ip:5084;r2=on;lr=on;ftag=d2e84f4a> 
Max-Forwards: 70 
From: <sip:4...@sip.company.tld>;tag=5K0FX0ryeBBeH 
To: "volga629" <sip:4...@sip.company.tld>;tag=d2e84f4a 
Call-ID: 137861_rel44MTA1ZGMwNzViODg5NDMwYzQ1NDQzYjlmMGExMzlmMmI 
CSeq: 98979038 BYE 
User-Agent: FreeSWITCH 
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, 
REFER, NOTIFY, PUBLISH, SUBSCRIBE 
Supported: timer, path, replaces 
Reason: Q.850;cause=16;text="NORMAL_CLEARING" 
Content-Length: 0 


IP (tos 0x10, ttl 64, id 802, offset 0, flags [none], proto UDP (17), length 
741) 
proxy_public_ip.llrp > client_public_ip.48147: [bad udp cksum 0x4d3e -> 
0x4f2d!] UDP, length 713 
E...."..@.*{.E.\c.........M>BYE 
sip:4200@client_public_ip:48147;rinstance=c4084e18f3f39974 SIP/2.0 
Via: SIP/2.0/UDP 
proxy_public_ip:5084;branch=z9hG4bK8395.d46858df1d9e02b910446fca09f1f864.0 
Via: SIP/2.0/UDP 
10.18.130.26:5160;received=10.18.130.26;rport=5160;branch=z9hG4bK33785247SrX3H 
Max-Forwards: 69 
From: <sip:4...@sip.company.tld>;tag=5K0FX0ryeBBeH 
To: "volga629" <sip:4...@sip.company.tld>;tag=d2e84f4a 
Call-ID: 137861_rel44MTA1ZGMwNzViODg5NDMwYzQ1NDQzYjlmMGExMzlmMmI 
CSeq: 98979038 BYE 
User-Agent: FreeSWITCH 
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, 
REFER, NOTIFY, PUBLISH, SUBSCRIBE 
Supported: timer, path, replaces 
Reason: Q.850;cause=16;text="NORMAL_CLEARING" 
Content-Length: 0 


IP (tos 0x0, ttl 52, id 810, offset 0, flags [DF], proto UDP (17), length 504) 
client_public_ip.48147 > proxy_public_ip.llrp: [udp sum ok] UDP, length 476 
E....*@.4..oc....E.\........SIP/2.0 481 Call/Transaction Does Not Exist 
Via: SIP/2.0/UDP 
proxy_public_ip:5084;branch=z9hG4bK8395.d46858df1d9e02b910446fca09f1f864.0 
Via: SIP/2.0/UDP 
10.18.130.26:5160;received=10.18.130.26;rport=5160;branch=z9hG4bK33785247SrX3H 
To: "volga629" <sip:4...@sip.company.tld>;tag=d2e84f4a 
From: <sip:4...@sip.company.tld>;tag=5K0FX0ryeBBeH 
Call-ID: 137861_rel44MTA1ZGMwNzViODg5NDMwYzQ1NDQzYjlmMGExMzlmMmI 
CSeq: 98979038 BYE 
Accept-Language: en 
Content-Length: 0 


IP (tos 0x10, ttl 64, id 63040, offset 0, flags [none], proto UDP (17), length 
413) 
10.18.130.27.sip > 10.18.130.26.5160: [bad udp cksum 0x19f4 -> 0x6386!] UDP, 
length 385 
E....@..@.j. 
... 
......(....SIP/2.0 481 Call/Transaction Does Not Exist 
Via: SIP/2.0/UDP 
10.18.130.26:5160;received=10.18.130.26;rport=5160;branch=z9hG4bK33785247SrX3H 
To: "volga629" <sip:4...@sip.company.tld>;tag=d2e84f4a 
From: <sip:4...@sip.company.tld>;tag=5K0FX0ryeBBeH 
Call-ID: 137861_rel44MTA1ZGMwNzViODg5NDMwYzQ1NDQzYjlmMGExMzlmMmI 
CSeq: 98979038 BYE 
Accept-Language: en 
Content-Length: 0 


Slava. 
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