Cisco Cisco IOS Software Release 12.2(15)ZL Notas de publicación
14
Important Notes
OL-4262-01
Important Notes
In the event of a Cisco CallManager failure, any transient calls fail and are cleared. With the exception
of ISDN Primary Rate Interface (PRI), active calls are maintained, and are cleared when a user hangs
up. (For ISDN PRI interfaces, active and transient calls are both cleared upon fallback.) MGCP gateway
fallback complements SRST and uses the H.323 protocol for basic call handling for FXS, FXO, T1-CAS
and T1/E1 ISDN PRI interfaces during the fallback period.
of ISDN Primary Rate Interface (PRI), active calls are maintained, and are cleared when a user hangs
up. (For ISDN PRI interfaces, active and transient calls are both cleared upon fallback.) MGCP gateway
fallback complements SRST and uses the H.323 protocol for basic call handling for FXS, FXO, T1-CAS
and T1/E1 ISDN PRI interfaces during the fallback period.
Note
The difference between SRST and MGCP gateway fallback is that in SRST, IP phones fall back to a local
gateway, which serves as the call processing engine during a Cisco CallManager failure, while for
MGCP gateway fallback, the MGCP gateway does not rely on a local gateway—it uses the default H.323
session application for call processing. That is, the MGCP gateway does not fall back to another local
gateway for control of its interfaces.
gateway, which serves as the call processing engine during a Cisco CallManager failure, while for
MGCP gateway fallback, the MGCP gateway does not rely on a local gateway—it uses the default H.323
session application for call processing. That is, the MGCP gateway does not fall back to another local
gateway for control of its interfaces.
Important Notes
The following sections contain important notes about Cisco IOS-related issues that can apply to the
Cisco ICS 7750.
Cisco ICS 7750.
Software Images on MRP and ASI Cards
All of the MRPs and ASIs in a Cisco ICS 7750 must run the same Cisco IOS image.
Caveats
Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are
the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious
of these three severity levels.
the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious
of these three severity levels.
Caveats in Release 12.2 T are also in Release 12.2(15)ZL1. For information on caveats in Cisco IOS
Release 12.2 T, refer to the
Release 12.2 T, refer to the
Caveats for Cisco IOS Release 12.2 T
document. For information on caveats
in Cisco IOS Release 12.2, refer to the
Caveats for Cisco IOS Release 12.2
document. These documents
list severity 1 and 2 caveats, and are located on CCO and the Documentation CD.
Note
If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any
severity. To reach the Bug Toolkit, log in to Cisco.com and click Technical Support:
Tools & Utilities: Software Bug Toolkit. Another option is to go to
severity. To reach the Bug Toolkit, log in to Cisco.com and click Technical Support:
Tools & Utilities: Software Bug Toolkit. Another option is to go to
http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl
.
Open Caveats - Release 12.2(15)ZL
This section describes unexpected behavior in Release 12.2(15)ZL.