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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
For configuration, examples, and general guidelines for virtual interface bundling on the Cisco CMTS,
refer to the following documents on Cisco.com:
• Cable Interface Bundling and Virtual Interface Bundling for the Cisco CMTS
http://www.cisco.com/en/US/docs/cable/cmts/feature/guide/ufg_bund.html
• Virtual Interfaces and Frequency Stacking Configuration on MC5x20S and MC28U Line Cards
http://www.cisco.com/en/US/tech/tk86/tk804/technologies_white_paper09186a0080232b49.shtml
VLAN Features
The Cisco uBR7200 Series support the following VLAN feature:
• HSRP over ISL in Virtual LAN Configurations, page 1-126
HSRP over ISL in Virtual LAN Configurations
Inter-Switch Link protocol (ISL) is a Cisco protocol for interconnecting multiple switches and
maintaining VLAN information as traffic goes between switches. ISL provides VLAN capabilities while
maintaining full wire speed performance on Fast Ethernet links in full- or half-duplex mode. ISL
operates in a point-to-point environment and will support up to 1000 VLANs. You can define virtually
as many logical networks as are necessary for your environment.
For configuration information for Hot Standby Router Protocol (HSRP) over Inter-Switch Link (ISL)
protocol, refer to these documents on Cisco.com:
• “Configuring Routing Between VLANs with Inter-Switch Link Encapsulation” chapter in the Cisco
IOS Switching Services Configuration Guide, Release 12.2
http://www.cisco.com/en/US/docs/ios/12_1/switch/configuration/guide/xcdvlisl.html
VPN and Layer 2 Tunneling Features
The Cisco uBR7200 Series supports multiple features and functions for virtual private networks (VPNs),
to include the following:
• Dynamic SID/VRF Mapping Support, page 1-126
• IP Type-of-Service and Precedence for GRE Tunnels, page 1-127
• IPv6 over L2VPN, page 1-127
• Mapping Service Flows to MPLS-VPN, page 1-128
• MPLS VPN Support for Subinterfaces and Cable Interface Bundles, page 1-128
• Overlapping Subinterface IP Addresses, page 1-129
• Transparent LAN Services (TLS) and L2 Tunneling ATM/SIDs, page 1-130
• Transparent LAN Services (TLS) and L2 Virtual Private Networks, page 1-130
Dynamic SID/VRF Mapping Support
Cisco IOS release 12.3(13a)BC introduces support for dynamic service ID (SID) and VRF mapping on
the Cisco CMTS, to support VoIP with MPLS. Formerly, the MPLS SID mapping feature only applied
to provisioned service flows. This feature enables the mapping of all PacketCable DQoS service flows
to one particular VRF.
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