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<DIV><FONT face=Arial size=2><SPAN class=163170505-07022008>Does anyone know if
Cisco SLB can support the SIP protocol? We have a situation where we need to
forward external calls from our SIP gateway to our Cisco Call Manager 5.1
servers. This is because our SIP gateway isn't smart enough to distinguish if
one of the CCM is down and try the other one - instead it forwards both calls to
the CCM and we get presented with two calls on our IP phones. We can set the SIP
gateway to forward it to one CCM, but this wouldn't give us any redundancy or
fail over should one CCM fail. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=163170505-07022008></SPAN></FONT><FONT
face=Arial size=2><SPAN class=163170505-07022008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=163170505-07022008>Here's the SLB
config:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=163170505-07022008>ip slb serverfarm
CCM-REAL<BR> nat server<BR> predictor leastconns<BR> real
172.16.55.5<BR> inservice<BR> real 172.16.55.6<BR>
inservice<BR>!<BR>ip slb vserver CCM-VIRT-TCP<BR> virtual 210.15.x.x
tcp 0<BR> serverfarm CCM-REAL<BR> inservice<BR>!<BR>ip slb
vserver CCM-VIRT-UDP<BR> virtual 210.15.x.x udp 0<BR> serverfarm
CCM-REAL<BR> inservice<BR></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=163170505-07022008>I'm finding that the
SIP headers do not have any of CCM IP's in them (172.16.55.5 or 172.16.55.6) so
obviously the packet gets discarded when it hits the CCM. Instead the SIP header
has the FROM: address as the SIP gateway IP (203.10.<SPAN
class=163170505-07022008>x</SPAN>.<SPAN class=163170505-07022008>x) </SPAN>and
the TO: address as the virtual server IP (210.15.x.x) (which we've set the SIP
gateway to forward to) - is there anyway to have TO address changed to
172.16.55.5/6 so the SIP call hits the SLB and then is load balanced to one of
the CCM's???</DIV></SPAN></FONT>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008></SPAN></FONT> </DIV><FONT face=Arial size=2>>
INVITE sip:<SPAN class=163170505-07022008>987654321</SPAN>@210.15.<SPAN
class=163170505-07022008>x</SPAN>.<SPAN class=163170505-07022008>x</SPAN>:5060
SIP/2.0<BR>> Via: SIP/2.0/UDP<BR>> 203.10.<SPAN
class=163170505-07022008>x</SPAN>.x<SPAN
class=163170505-07022008></SPAN><BR>>
:5061;branch=z9hG4bK4a2139daf022d80af26275540f1b5722;rport<BR>> Max-Forwards:
70<BR>> From: <sip:<SPAN
class=163170505-07022008>12345678</SPAN>@203.10.<SPAN
class=163170505-07022008>x</SPAN>.<SPAN
class=163170505-07022008>x</SPAN>>;tag=171a2a27c0d677b4b142551fa092f0f0<BR>>
To: <sip:<SPAN class=163170505-07022008>987654321</SPAN>@210.15.<SPAN
class=163170505-07022008>x</SPAN>.<SPAN
class=163170505-07022008>x</SPAN>><BR>> Call-ID: </FONT><A
href="mailto:1C6F6260-D46511DC-84E280E4-D0AAFDDC@203.10.x.x"><FONT face=Arial
size=2>1C6F6260-D46511DC-84E280E4-D0AAFDDC@203.10.<SPAN
class=163170505-07022008>x.x</SPAN></FONT></A><BR><FONT face=Arial size=2>>
CSeq: 200 INVITE<BR>> Contact: Anonymous <sip:203.10.<SPAN
class=163170505-07022008>x</SPAN>.<SPAN
class=163170505-07022008>x</SPAN>:5061><BR>> Expires: 300<BR>>
User-Agent: Sippy<BR>> cisco-GUID:
1494077719-3576435164-2575237145-3119402593<BR>> h323-conf-id:
1494077719-3576435164-2575237145-3119402593<BR>> Content-disposition:
session<BR>> Content-Length: 420<BR>> Content-Type: application/sdp</FONT>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008>Thanks.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=163170505-07022008>Andy</SPAN></FONT></DIV></BODY><!--[object_id=#staff.netspace.net.au#]--><P align=left><FONT face=Arial size=1>This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the organisation. Finally, the recipient should check this email and any attachments for the presence of viruses. The organisation accepts no liability for any damage caused by any virus transmitted by this email.</FONT></P></HTML>