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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Table 62.
CLI Commands for Active and Loopback Interface
Command
Purpose
configure interface mgmt 6/0 active ip <address> [<netmask>]
Defines the active IP address on the SCM. Valid slot numbers are 6 and 7; either one
may be used to define the active IP address. If the IP mask is not provided, then it
defaults to the mask of the RSM interface ip address.
configure interface mgmt 6/0 no active ip [<address> [<netmask>]]
Removes the active IP address associated with the SCM management port. The IP
address and mask are not required.
configure interface loopback <0…13> [ ip address <a
ddress> <netmask> ] [shutdown]
[no]
Defines the syntax to assign an IP address to a loopback interface and admin state
(shutdown or restored to service).
configure interface loopback <loopback number> ip vrf forwarding <vrf_name>
Moves a loopback interface to the VRF specified.
configure interface loopback <0…15> ip ospf cost <metric>
Defines the OSPF cost to reach the loopback interface. No other OSPF parameters are
configurable.
To configure ports for in-band management see 5. Configure RSM Ethernet Connections.
To configure ports for out-of-band management see 6. Out-of-Band Management (Optional).
The figure below depicts a network configuration where a loopback interface is defined for in-band management. In this
figure the active IP address is used for out-of-band management.
This network topology shows the loopback interface used as the "forwarding address" of OSPF Type-7 LSAs that advertise
CAM-side prefixes. Since the loopback interface IP address was previously announced in a Router LSA and is part of the
OSPF AS, ECMP is available, from the switch to the C4/c CMTS, for packets destined for RIP advertised networks.