Anyone seen a slick way to convert headers from full to compact? After a bunch of diversions, we get close to the PMTU. Thanks, David
Acme can strip headers, and so can SER/Variants. Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers. -Scott -----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion Anyone seen a slick way to convert headers from full to compact? After a bunch of diversions, we get close to the PMTU. Thanks, David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
Yep, acme is the first place I'm looking. It'd be nice to use their ability to store the value in the From: header, delete the entire From: header, then write the stored value in a newly-created f: header. David On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
Acme can strip headers, and so can SER/Variants. ?Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers.
? ? ? ?-Scott
-----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion
Anyone seen a slick way to convert headers from full to compact?
After a bunch of diversions, we get close to the PMTU.
Thanks,
David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
Any way to use TCP to break up the packet? David Hiers wrote:
Yep, acme is the first place I'm looking. It'd be nice to use their ability to store the value in the From: header, delete the entire From: header, then write the stored value in a newly-created f: header.
David
On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
Acme can strip headers, and so can SER/Variants. Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers.
-Scott
-----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion
Anyone seen a slick way to convert headers from full to compact?
After a bunch of diversions, we get close to the PMTU.
Thanks,
David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
That's the book answer (18.1.1), but some carriers are UDP only. On Thu, Nov 5, 2009 at 9:57 AM, Lee Riemer <lriemer at bestline.net> wrote:
Any way to use TCP to break up the packet?
David Hiers wrote:
Yep, acme is the first place I'm looking. It'd be nice to use their ability to store the value in the From: header, delete the entire From: header, then write the stored value in a newly-created f: header.
David
On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
Acme can strip headers, and so can SER/Variants. ?Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers.
? ? ? ?-Scott
-----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion
Anyone seen a slick way to convert headers from full to compact?
After a bunch of diversions, we get close to the PMTU.
Thanks,
David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
Quite. I've been involved in irritating 3-way conversations with "we do UDP only, just fragment over that IPSEC tunnel we require that decreases the MTU a bit" VZB and "Oh, no we'd never fragment in response to ICMP and if you lower the MTU, it'll just change the point at which we switch over to TCP" Acme. I have yet to find an elegant solution that fixes the problem for real, though various size reduction exercises pretty much make the problem go away for any sane call flow. --Jon Radel David Hiers wrote:
That's the book answer (18.1.1), but some carriers are UDP only.
Hmm, I don't know if there's a way to not have the Acme SBC convert "f:" to "From" when it actually sends the message. I wrote a HMR to store the value of From:, then delete it, then add a header of "f" then add the stored value to an INVITE heading out to one of my carriers on my lab system. A wireshark capture indeed shows the from being deleted and re-added to the bottom, but it lists as "From" instead of "f", even in the converted hex frame in the bottom wireshark window. I know there someone from Acme on here, perhaps they can shed some light on it? Here's what I came up with (I only used invite in my test but that's easily changed to any): sip-manipulation name CompactHeaders description header-rule name StoreFrom header-name From action store comparison-type pattern-rule match-value .* msg-type request new-value methods INVITE header-rule name DeleteFrom header-name From action delete comparison-type case-sensitive match-value msg-type request new-value methods INVITE header-rule name AddF header-name f action add comparison-type case-sensitive match-value msg-type request new-value $StoreFrom.$0 methods INVITE On a different tack, are you perhaps able to strip some extraneous information from the headers that the carrier doesn't need or even in the SDP such as unused codecs? ---- Brandon Buckner Switching Technician / VoIP Admin Iowa Network Services brandonb at netins.com ________________________________________ From: voiceops-bounces at voiceops.org [voiceops-bounces at voiceops.org] On Behalf Of David Hiers [hiersd at gmail.com] Sent: Thursday, November 05, 2009 11:17 AM To: Scott Berkman Cc: VoiceOps at voiceops.org Subject: Re: [VoiceOps] full to compact header conversion Yep, acme is the first place I'm looking. It'd be nice to use their ability to store the value in the From: header, delete the entire From: header, then write the stored value in a newly-created f: header. David On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
Acme can strip headers, and so can SER/Variants. Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers.
-Scott
-----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion
Anyone seen a slick way to convert headers from full to compact?
After a bunch of diversions, we get close to the PMTU.
Thanks,
David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
When you store without using elements, doesn't it store the whole line, including "From:"? Brandon Buckner wrote:
Hmm, I don't know if there's a way to not have the Acme SBC convert "f:" to "From" when it actually sends the message. I wrote a HMR to store the value of From:, then delete it, then add a header of "f" then add the stored value to an INVITE heading out to one of my carriers on my lab system. A wireshark capture indeed shows the from being deleted and re-added to the bottom, but it lists as "From" instead of "f", even in the converted hex frame in the bottom wireshark window. I know there someone from Acme on here, perhaps they can shed some light on it? Here's what I came up with (I only used invite in my test but that's easily changed to any):
sip-manipulation name CompactHeaders description header-rule name StoreFrom header-name From action store comparison-type pattern-rule match-value .* msg-type request new-value methods INVITE header-rule name DeleteFrom header-name From action delete comparison-type case-sensitive match-value msg-type request new-value methods INVITE header-rule name AddF header-name f action add comparison-type case-sensitive match-value msg-type request new-value $StoreFrom.$0 methods INVITE
On a different tack, are you perhaps able to strip some extraneous information from the headers that the carrier doesn't need or even in the SDP such as unused codecs?
---- Brandon Buckner Switching Technician / VoIP Admin Iowa Network Services brandonb at netins.com ________________________________________ From: voiceops-bounces at voiceops.org [voiceops-bounces at voiceops.org] On Behalf Of David Hiers [hiersd at gmail.com] Sent: Thursday, November 05, 2009 11:17 AM To: Scott Berkman Cc: VoiceOps at voiceops.org Subject: Re: [VoiceOps] full to compact header conversion
Yep, acme is the first place I'm looking. It'd be nice to use their ability to store the value in the From: header, delete the entire From: header, then write the stored value in a newly-created f: header.
David
On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
Acme can strip headers, and so can SER/Variants. Also if you are specifically talking about SIP messages coming out from Broadsoft towards the PSTN, there are some options in the AS SIP Interface CLI settings about sending diversion headers and the different versions of PAID (privacy mode I think?) that can help you shorten the headers.
-Scott
-----Original Message----- From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org] On Behalf Of David Hiers Sent: Thursday, November 05, 2009 9:44 AM To: VoiceOps at voiceops.org Subject: [VoiceOps] full to compact header conversion
Anyone seen a slick way to convert headers from full to compact?
After a bunch of diversions, we get close to the PMTU.
Thanks,
David _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
_______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
participants (5)
-
BrandonB＠netins.com -
hiersd＠gmail.com -
jradel＠vantage.com -
lriemer＠bestline.net -
scott＠sberkman.net