Chapter 15: Interface IP Configuration
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Configuring IP Static Routes
How to Add/Delete/View a Static IP Route
1.
To add an IP Route:
configure ip route <dest route prefix> <dest route mask> <next-hop ip addr> [metric <0-255>]
Where the value assigned to the metric parameter defines the weight or cost of the route.
2.
To delete an IP Route:
configure no ip route <dest route prefix> <dest route mask> <next-hop ip addr>
3.
To display the IP Routes:
show ip route
Multiple VRFs
Overview
The Multiple Virtual Routing and Forwarding (Multiple VRFs) feature was developed to support separation of traffic for
different classes of users or for different services. It also allows MSOs to offer multiple service providers. Virtual routing is
a form of policy routing that allows the administrator to assign subscribers to an ISP via simple IP interface configuration
on the C4/c CMTS. The administrator is responsible for programming the DHCP server to assign the proper IP addresses to
the subscriber CMs and CPEs. However, the C4/c CMTS must allow for multiple network configurations, including DHCP
servers that vary in location and number. Separate routing tables are maintained for each VRF. Each data packet routed
through the C4/c CMTS is associated with a VRF and is routed using the corresponding route table. This functionality is
similar to that of BGP/MPLS Layer 3 VPNs.
