Hello,
I configured a Cisco 2921 CME version 9.1 and testing to register a Cisco 7942G (SCCP42.8-5-3S load) phone on the internet to this CME. I see the phone sending a SYN packet to the CME, but CME does not respond with a SYN,ACK. Instead it is sending a RST,ACK back to the phone. Can anyone help me figure out why the CME is not doing the 3-way handshake?? I am assuming that CME 9.1 should not have any issues with registering Cisco 7942G SCCP 8-5(3).
Config on the router CME:
telephony-service
no auto-reg-ephone
max-ephones 100
max-dn 100
ip source-address <public ip of the router> port 2000
timeouts interdigit 5
load 7942 SCCP42.8-5-3S
max-conferences 4 gain -6
transfer-system full-consult
create cnf-files version-stamp Jan 01 2002 00:00:00
!
!
ephone-dn 1
number <DID>
!
!
ephone 1
no phone-ui speeddial-fastdial
no multicast-moh
device-security-mode none
mac-address <mac-address-of the phone>
type 7942
button 1:1
debug from the router: ( I hid the IP addresses and MAC of the phone for security)
Mar 24 19:43:48.078: TFTP: Looking for CTLSEP<MAC-OF-PHONE>.tlv
*Mar 24 19:43:49.034: TFTP: Looking for SEP<MAC-OF-PHONE>.cnf.xml
*Mar 24 19:43:49.038: TFTP: Opened system:/its/vrf1/XMLDefault7942.cnf.xml, fd 9, size 1268 for process 429
*Mar 24 19:43:52.006: TFTP: Finished system:/its/vrf1/XMLDefault7942.cnf.xml, time 00:00:02 for process 429
*Mar 24 19:43:53.182: TFTP: Looking for English_United_States/mk-sccp.jar
*Mar 24 19:43:54.198: TFTP: Looking for United_States/g3-tones.xml
*Mar 24 19:43:55.318: tcp0: I LISTEN <PHONE-IP>:52594 <CME-PUBLIC-IP>:2000 seq 2821788526OPTS 4 SYN WIN 64240
*Mar 24 19:43:55.318: TCP: sent RST to <PHONE-IP>:52594 from <CME-PUBLIC-IP>:2000
*Mar 24 19:44:55.262: tcp0: I LISTEN <PHONE-IP>:54330 <CME-PUBLIC-IP>:2000 seq 2060508902OPTS 4 SYN WIN 64240
*Mar 24 19:44:55.262: TCP: sent RST to <PHONE-IP>:54330 from <CME-PUBLIC-IP>:2000
Thanks!
