Logically isolated VPNs with MPLS - Centralized DHCP

[Ronald F. Tallman]

Looking for a centralized DHCP solution that supports the following:

 

*       Numerous VPNs isolated with MPLS - Therefore isolated/separated
subnets.

*       Clients dispatch DHCP request

*       Cisco router/relay agent forwards request to centralized DHCP server
to management subnet

*       Cisco relay agent adds information with Option 82

 

*       Presently DHCP server recognizes forwarded request but will not
serve IP as it's sourced from "Unknown Subnet"

 

*       The subnet is actively provisioned in the DHCP server configuration

 

 

Some searching has discussed a HEX value implemented into the Option 82
relay packet to pass ClassID for the subnet.?

 

Anyone have a working configuration example?

 

Thanks

 

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