Cisco Cisco IOS Software Release 12.2(8)YJ
11
Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(8)YJ
OL-2792-02
New and Changed Information
Note
Starting with Release 12.2(8)YJ, the Cisco 1751 and 1760 routers no longer need a voice image to
support data applications on T1/E1 VWICs.
support data applications on T1/E1 VWICs.
The T1 and E1 VWICs allow individual DS0s or channels of a DS1 circuit to be grouped together to
create channel groups. For example, the 64kb channels of a T1 circuit could form a channel group to
connect to a frame relay network. The Cisco 1721 router supports up to two data channel groups over a
single port.
create channel groups. For example, the 64kb channels of a T1 circuit could form a channel group to
connect to a frame relay network. The Cisco 1721 router supports up to two data channel groups over a
single port.
Drop and Insert (DI) VWICs have two T1/E1 ports. In addition to the functionality described above, the
DI VWICs enable specified TDM DS0 channels from one port to be directly cross-connected to another
port within the same slot. For example, the first three DS0s of one port can be directly cross-connected
to the first three DS0s of a second port. The remaining DS0s can group together as a channel group to
or from other interfaces on the router. DI VWICs provide easy multiplexing of TDM voice and data over
a single circuit, within two locals ports of a T1/E1 DI VWIC.
DI VWICs enable specified TDM DS0 channels from one port to be directly cross-connected to another
port within the same slot. For example, the first three DS0s of one port can be directly cross-connected
to the first three DS0s of a second port. The remaining DS0s can group together as a channel group to
or from other interfaces on the router. DI VWICs provide easy multiplexing of TDM voice and data over
a single circuit, within two locals ports of a T1/E1 DI VWIC.
The G.703 VWICs support unframed and framed E1 circuits.
New Software Features in Release 12.2(8)YJ
The following sections describe the new software features supported by the Cisco 1700 series routers for
Release 12.2(8)YJ.
Release 12.2(8)YJ.
Cisco Easy VPN Client
Cable modems, xDSL routers, and other forms of broadband access provide high-performance
connections to the Internet, but many applications also require the security of VPN connections that
perform a high level of authentication and that encrypt the data between two particular endpoints.
However, establishing a VPN connection between two routers can be complicated, and typically requires
tedious coordination between network administrators to configure the VPN parameters for the
two routers.
connections to the Internet, but many applications also require the security of VPN connections that
perform a high level of authentication and that encrypt the data between two particular endpoints.
However, establishing a VPN connection between two routers can be complicated, and typically requires
tedious coordination between network administrators to configure the VPN parameters for the
two routers.
The Cisco Easy VPN Client feature eliminates much of this tedious work by implementing the Cisco
Unity Client protocol, which allows most VPN parameters to be defined at a VPN remote access server.
This server can be a dedicated VPN device such as a VPN 3000 concentrator or a Cisco PIX Firewall,
or a Cisco IOS router that supports the Cisco Unity Client protocol.
Unity Client protocol, which allows most VPN parameters to be defined at a VPN remote access server.
This server can be a dedicated VPN device such as a VPN 3000 concentrator or a Cisco PIX Firewall,
or a Cisco IOS router that supports the Cisco Unity Client protocol.
After the VPN remote access server has been configured, a VPN connection can be created with minimal
configuration on an IPSec client, such as the Cisco 806, 826, 827, and 828 routers and the Cisco 1700
series routers. When the IPSec client then initiates the VPN tunnel connection, the VPN remote access
server pushes the IPSec policies to the IPSec client and creates the corresponding VPN tunnel
connection.
configuration on an IPSec client, such as the Cisco 806, 826, 827, and 828 routers and the Cisco 1700
series routers. When the IPSec client then initiates the VPN tunnel connection, the VPN remote access
server pushes the IPSec policies to the IPSec client and creates the corresponding VPN tunnel
connection.
Note
Release 12.2(8)YJ is the first release to support both Easy VPN server and client functionality in the
Cisco 1700 IOS images.
Cisco 1700 IOS images.
The Cisco Easy VPN Client feature provides for automatic management of the following details:
•
Negotiating tunnel parameters—Addresses, algorithms, lifetime, and so on.
•
Establishing tunnels according to the parameters.
•
Automatically creating the NAT and PAT translation and associated access lists that are needed,
if any.
if any.