Cisco Cisco IOS Software Releases 12.2 B 發佈版本通知

The DHCP Option 82 Support for RBE feature provides support for the Dynamic Host Configuration 
Protocol (DHCP) Relay Agent Information Option (Option 82) when using ATM RBE.

Service providers are increasingly using ATM RBE to configure DSL access. The DHCP Option 82 
Support for RBE feature enables those service providers to use DHCP to assign IP addresses and DHCP 
Option 82 to implement IP address assignment policies such as limiting the number of IP addresses on 
specific ports on specific ports or ATM VCs.

The DHCP Relay Agent Information Option enables a DHCP relay agent to insert information about 
itself when forwarding client-originated DHCP packets to a DHCP server. The DHCP server can use this 
information to implement IP address or other parameter-assignment policies.

The DHCP Option 82 Support for RBE feature uses a suboption of the DHCP Relay Agent Information 
Option called Agent Remote ID. The Agent Remote ID suboption enables the DHCP relay agent to 
report the ATM RBE subinterface port information to the DHCP server when a DHCP IP address request 
is processed through the ATM RBE subinterface. The DHCP server can use the ATM RBE subinterface 
information for making IP address assignments and security policy decisions.

Field Notices—Cisco recommends that you view the field notices for this release to see if your 
software or hardware platforms are affected. If you have an account on Cisco.com, you can find field 
notices at http://www.cisco.com/warp/customer/770/index.shtml. If you do not have a Cisco.com 
login account, you can find field notices at http://www.cisco.com/warp/public/770/index.shtml.

Product Bulletins—If you have an account on Cisco.com, you can find product bulletins at 
http://www.cisco.com/warp/customer/cc/general/bulletin/index.shtml. If you do not have a 
Cisco.com login account, you can find product bulletins at 
http://www.cisco.com/warp/public/cc/general/bulletin/iosw/index.shtml.

What’s Hot for IOS Releases: Cisco IOS Release 12.2(2)B6—What’s Hot for IOS Releases: 
Cisco IOS Release 12.2(2)B6 provides information about caveats that are related to deferred 
software images for Cisco IOS Release 12.2(2)B6. If you have an account on Cisco.com, you can 
access What’s Hot for IOS Releases: Cisco IOS Release 12.2(2)B6 at 
http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml or by logging in and selecting Software 
Center: Cisco IOS Software: What’s Hot for IOS Releases: Cisco IOS Release 12.2(4)B3. 

What’s New for IOS — What’s New for IOS lists recently posted Cisco IOS software releases and 
software releases that have been removed from Cisco.com. If you have an account on Cisco.com, 
you can access What’s New for IOS at http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml or 
by logging in and selecting Software Center: Cisco IOS Software: What’s New for IOS.