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Highlighted
Beginner

SIP: Warning: Unrecognized attribute (bsoft)

Hello Everyone!

I am confused on a seemingly harmless error/warning I am getting on a router (ISR 4351) iOS XE 03.16.00.S.155-3.S-ext.SPA

On incoming calls a "debug ccsip all" shows this:

Apr 25 12:34:22.494: //214953/C83C664091E7/SIP/Media/sipSPI_ipip_GetContentSDPForPthru: Updated SDP from inbound  container:266
SIP: Warning: Unrecognized attribute (bsoft)
SIP: Trying to parse unsupported attribute at media level
SIP: Group (a= group line) attribute, level 65535 instance 1 not found.
Apr 25 12:34:22.494: //214953/C83C664091E7/SIP/Info/verbose/1/sipSPIValidateConnectionAddress: Dest port = 52146
SIP: Attribute mid, level 1 instance 1 not found.
Apr 25 12:34:22.494: //214953/C83C664091E7/SIP/Info/notify/6/sipSPIValidateStreamAddrType: stream:1, Mode : 1
Apr 25 12:34:22.494: //214953/C83C664091E7/SIP/Info/verbose/513/resolve_media_ip_address_to_bind: peer_tag=2201

I am unsure why this is happening or how can I resolve. I've tried a few things to no avail and just don't know enough about normalization or diversion headers to address this. I am just guessing it's where this can be fixed... ??

Please help!

Thank you and have a great day!

3 REPLIES 3
Highlighted
Cisco Employee

This looks like the attribute in the SDP is not supported or having issue in parsing by GW , AFAIK this is just a warning message as it won't cause any issue.

How frequent you see this message on GW? do you have any complete along with error so that i can tell which particular attribute value causing this issue and generating this error msg.

Br,

Nadeem Ahmed

Br, Nadeem Please rate all useful post.
Highlighted

Hello Nadeem!

thanks for replying!

Every incoming call causes 4 messages like this to be logged "SIP: Trying to parse unsupported attribute at media level", so I see hundreds of lines like this a day on the GW. As far as I can see it is the "a=bsoft: 1 image udptl t38" attribute...

I am attaching a full detailed log of "debug ccsip all"

Again, thanks!

Highlighted

Hello Mario,

It seems like GW unable to understand  and parse this attribute value "a=bsoft: 1 image udptl t38" generating warning message.

SIP: Warning: Unrecognized attribute (bsoft)
SIP: Trying to parse unsupported attribute at media level
SIP: Group (a= group line) attribute, level 65535 instance 1 not found.

Received:
INVITE sip:8702027015@65.124.27.90:5060 SIP/2.0
Via: SIP/2.0/UDP 21.20.6.9:5100;branch=z9hG4bKv3tg5e306065pbnt62j0.1
From: "CORRAL,MARIO"<sip:6787945491@voip.centurylink.com;user=phone>;tag=1447024678-1461605662438-
To: "8702027015 8702027015"<sip:8702027015@voip.centurylink.com>
Call-ID: BW113422438250416883169632@10.73.16.5
CSeq: 658390900 INVITE
Contact: <sip:6787945491@21.20.6.9:5100;transport=udp>
Allow: ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,NOTIFY,UPDATE
Recv-Info: x-broadworks-client-session-info
Accept: application/btbc-session-info,application/media_control+xml,application/sdp,multipart/mixed
Max-Forwards: 69
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 266

v=0
o=BroadWorks 435188536 1 IN IP4 21.20.6.9
s=-
c=IN IP4 21.20.6.9
t=0 0
m=audio 52146 RTP/AVP 18 0 96
a=rtpmap:18 G729/8000

a=rtpmap:0 PCMU/8000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=bsoft: 1 image udptl t38
a=ptime:2

Br,

Nadeem Ahmed

Br, Nadeem Please rate all useful post.
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