Cisco Cisco IOS Software Release 12.2(8)YM
6
Release Notes for the Cisco 806 Router and Cisco 820 Series Routers for Cisco IOS Release 12.2(8)YM
OL-3006-03
New and Changed Information
Cisco Feature Navigator
Cisco Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS
software images support a specific set of features and which features are supported in a specific Cisco
IOS image. You can search by feature or release. Under the release section, you can compare releases
side by side to display both the features unique to each software release and the features in common.
software images support a specific set of features and which features are supported in a specific Cisco
IOS image. You can search by feature or release. Under the release section, you can compare releases
side by side to display both the features unique to each software release and the features in common.
To access Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten or
lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check
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details with a new random password will be e-mailed to you. Qualified users can establish an account
on Cisco.com by following the directions found at this URL:
lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check
will verify that your e-mail address is registered with Cisco.com. If the check is successful, account
details with a new random password will be e-mailed to you. Qualified users can establish an account
on Cisco.com by following the directions found at this URL:
Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology
releases occur. For the most current information, go to the Cisco Feature Navigator home page at the
following URL:
releases occur. For the most current information, go to the Cisco Feature Navigator home page at the
following URL:
New and Changed Information
The following sections list the new hardware and software features supported by Release 12.2(8)YM for
the SOHO 70 Series Routers and the Cisco 800 Series Routers.
the SOHO 70 Series Routers and the Cisco 800 Series Routers.
New Software Features in Release 12.2(8)YM
The following sections list the new software features supported by Cisco IOS Release 12.2(8)YM1 on
the and the Cisco 800 Series Routers.
the and the Cisco 800 Series Routers.
Hot Standby Router Protocol
Hot Standby Router protocol (HSRP) enables a set of routers to work together to present the appearance
of a single virtual router or default gateway to the hosts on a LAN. HSRP is particularly useful in
environments where critical applications are running and fault-tolerant networks have been designed. By
sharing an IP address and a MAC address two or more routers acting as one virtual router are able to
seamlessly assume the routing responsibility in the case of a defined event or the unexpected failure. This
enables hosts on a LAN to continue to forward IP packets to a consistent IP and MAC address enabling
the changeover of devices doing the routing to be transparent to them and their sessions.
of a single virtual router or default gateway to the hosts on a LAN. HSRP is particularly useful in
environments where critical applications are running and fault-tolerant networks have been designed. By
sharing an IP address and a MAC address two or more routers acting as one virtual router are able to
seamlessly assume the routing responsibility in the case of a defined event or the unexpected failure. This
enables hosts on a LAN to continue to forward IP packets to a consistent IP and MAC address enabling
the changeover of devices doing the routing to be transparent to them and their sessions.
Refer to
Software Enhancements for the Cisco 800 Routers and SOHO Routers
for more information on
this feature.
Domain Name System Proxy
Domain Name System (DNS) proxy enables the router to act as a Proxy DNS server. This means that it
will receive DNS queries on behalf of the real DNS servers and proxy for hosts connected to the LAN.
This enables the DHCP server to immediately send hosts on the LAN the router's own LAN address as
the DNS server IP address. The router then forwards the DNS queries from local users to real DNS
servers after the WAN connection is initiated, and it caches the DNS records in the answers.
will receive DNS queries on behalf of the real DNS servers and proxy for hosts connected to the LAN.
This enables the DHCP server to immediately send hosts on the LAN the router's own LAN address as
the DNS server IP address. The router then forwards the DNS queries from local users to real DNS
servers after the WAN connection is initiated, and it caches the DNS records in the answers.