Cisco 7246VXR - uBR Router User Manual

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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-05
Chapter 1 Overview of Cisco uBR7200 Series Software
cops tcp window-size
http://www.cisco.com/en/US/docs/cable/cmts/feature/guide/uFGnpls1.html
Virtual Interfaces
The Cisco uBR7200 Series supports the following virtual interface feature, primarily in the
Cisco
IOS 12.3 BC release train:
• Virtual Interface Bundling on the Cisco uBR-MC28/U BPE, page 1-125
Virtual Interface Bundling on the Cisco uBR-MC28/U BPE
Cisco IOS Release 12.3(13a)BC introduces support for virtual interface bundling on the Cisco
uBR72046VXR universal broadband router and the Cisco uBR-MC28/U Broadband Processing Engine
(BPE).
In prior Cisco IOS releases, cable interface bundling was limited to physical interfaces as master or slave
interfaces, and show commands did not supply bundle information.
Virtual interface bundling removes the prior concepts of master and slave interfaces, and introduces
these additional changes:
• Virtual interface bundling uses bundle interface and bundle members instead of master and slave
interfaces.
• The virtual bundle interface is virtually defined, as with IP loopback addresses, for example.
• Virtual interface bundling supports bundle information in multiple show ip interface commands.
Virtual interface bundling prevents loss of connectivity on physical interfaces should there be a failure,
problematic online insertion and removal (OIR) of one line card in the bundle, or erroneous removal of
configuration on the master interface.
Virtual interface bundling supports and governs the following Layer 3 settings for the bundle member
interfaces:
• IP address
• IP helper-address
• source-verify and lease-timer functions
• cable dhcp-giaddr (The giaddr field is set to the IP address of the DHCP client.)
• Protocol Independent Multicast (PIM)
• Access control lists (ACLs)
• Sub-interfaces
Note This virtual interface for the bundle should always remain on (enabled with no shutdown), but the
Cisco CMTS provides warning messages prior to execution of the shutdown command.

Cisco 7246VXR - uBR Router Specifications

General

Brand	Cisco
Model	7246VXR - uBR Router
Category	Network Router
Language	English