we have an cisco uBR7246VXR (UBR7200-NPE-G1) with IOS ubr7200-ik9su2-mz.123-23.BC7.bin.
Cisco doc says:
When using separate IP address pools for cable modems and CPE devices, you can use the cable dhcp-giaddr policy command to specify that cable modems should use an address from the primary pool and that CPE devices should use addresses from the secondary pool. The default is for the CMTS to send all DHCP requests to the primary DHCP server, while the secondary servers are used only if the primary server does not respond. The different DHCP servers are specified using the cable helper commands.
Beginning with Cisco IOS Release 12.2(33)SCD5, the GIADDR option simply changes the source IP address of the DHCP request so that the DHCP server can use different subnets to assign the right IP address depending on the types of CPE devices (namely cable modems, media terminal adapters [MTA], portal servers [PS], and set-top boxes [STB]). This enables faster processing of IP addresses; and in case the IP address does not belong to the subnets on the DHCP server, there is minimal usage of CPU resources.
But if I want to use this command only this is available:
(config-if)#cable dhcp-giaddr policy ?
strict With policy, use giaddr as the src IP addr in IP header for forwarded
I can't set special address for mta and so on in GIADDR field. Whats wrong? Is there a global command to enable this?
Cisco Champion Radio · S8|E3 The Cisco DNA Center Machine Reasoning Engine
Machine Reasoning is a new category of AI/ML that you will soon hear a lot about. It saves your IT team time by automating complex and tedious networking tasks. It can also...
To participate in this event, please use the button to ask your questions
In this session attendees will receive an introduction to Software Defined-WAN (SD-WAN) and the importance of control connections, and learn how to configure devices usi...
Community Live- May the SD-WAN Force Be With You
(Live event - Tuesday 19th January, 2021 at 10:00 am Pacific/ 1:00 pm Eastern / 7:00 pm Paris)
This event took place on Tuesday 19th, January 2021 at 10:00hrs PDT
In this session attendees recei...
Cisco DNA Center
What's new in Cisco DNA Center 2.1.2
Cisco DNA Center 2.1.2.x Features and Capabilities
Cisco DNA Center -Intent Based Networki...
A major international airport is looking to build a cutting-edge new terminal, designed to run 24/7 with no interruptions. With the airport always on round the clock, a critical component required to support this is the surveillance infrastructure, which ...