Failover Sequence
Address List from DNS,
Priority, Result
P1 - First Priority Address
P2 - Second Priority
Address
SIP IP Preference
IP Mode
2009:1:1:1:1 -> 2.2.2.2 ->
2009:2:2:2:2
P1- 2009:1:1:1::1
P2 - 2.2.2.2, 2009:2:2:2::2
Result
: Phone will send
the SIP messages to
2009:1:1:1::1 first.
IPv4
Dual Mode
2009:1:1:1:1 ->
2009:2:2:2:2
->2.2.2.2
P1- 2009:1:1:1::1
P2 - 2.2.2.2, 2009:2:2:2::2
Result
: Phone will send
the SIP messages to
1.1.1.1 first.
IPv6
Dual Mode
1.1.1.1 -> 2.2.2.2
P1 - 1.1.1.1, 2009:1:1:1::1
P2 - 2.2.2.2, 2009:2:2:2::2
Result
: Phone will send
the SIP messages to
1.1.1.1 first.
IPv4
or
IPv6
IPv4 Only
2009:1:1:1:1 ->
2009:2:2:2::2
P1 - 1.1.1.1, 2009:1:1:1::1
P2 - 2.2.2.2, 2009:2:2:2::2
Result
: Phone will send
the SIP messages to
2009:1:1:1::1 first.
IPv4
or
IPv6
IPv6 Only
SDP IP Preference - ALTC helps peers in dual-mode negotiate RTP address family.
Procedure
Step 1
On the phone web page, select
Admin Login
>
advanced
>
Voice
>
SIP
.
Step 2
In the
SIP Parameters
section, select
IPv4
or
IPv6
in the
SIP IP Preference
field.
Step 3
In the
RTP Parameters
section, select
IPv4
or
IPv6
in the
SDP IP Preference
field.
For details, see
SDP IP Preference
in
RTP Parameters, on page 226
.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
58
SIP and NAT Configuration
Summary of Contents for 8851
Page 23: ...P A R T I About the Cisco IP Phone Technical Details page 9 Cisco IP Phone Hardware page 21 ...
Page 24: ......
Page 36: ...Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide 20 USB Port Information ...
Page 48: ......
Page 98: ......
Page 136: ......
Page 168: ...Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide 152 XML Services ...
Page 204: ...Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide 188 Capture Packets ...
Page 210: ......