I am currently trying get DHCP to work on the 9906. Currently I am using it as a Relay Agent.
I am trying to attach a L3 ip address scheme to a loopback interface so i can share those pools across multiple service tags. (561,562,563,ect Vlans) When i assign the IP's to the loopback interface i get an ARP entry in the router but its as if the CPE is still unable to see the gateway. Checking the CPE shows the correct Address statements for IP, GW, and Subnet. If I attach those IP's directly to the subinterface it works just fine. Our DHCP server lives on another subnet declared on a interface leaving the ASR9K box, we also currently use Helper-address statements to relay out for IP assignement.
The devices pulling an IP need to reach out to the same DHCP server for TFTP file's to be downloaded so the modems can pull the correct config. I can ping the Gateway from the modem, i can ping the DHCP server IP's but just unable to pull a webpage nor is the modem able to pull its TFTP file.
My config below.
dhcp ipv4
profile RMD relay
helper-address vrf default 174.137.98.13 giaddr 0.0.0.0
helper-address vrf default 174.137.98.15 giaddr 0.0.0.0
relay information policy keep
relay information option allow-untrusted
! interface TenGigE0/2/0/7.561 relay profile RMD
interface Loopback561
description *** Public/Modem_EMTA_MGMT ***
ipv4 helper-address vrf default XXX.XXX.XXX.XXX
ipv4 helper-address vrf default XXX.XXX.XXX.XXX
ipv4 address 174.137.108.1 255.255.255.0
ipv4 address 10.3.20.1 255.255.255.0 secondary
ipv4 address 10.3.21.1 255.255.255.0 secondary
ipv4 address 10.4.0.1 255.255.240.0 secondary
ipv4 address 10.5.0.1 255.255.240.0 secondary
interface TenGigE0/2/0/7.561
description *** Public/EMT-Modem MGMT ***
ipv4 point-to-point
ipv4 helper-address vrf default XXX.XXX.XXX.XXX
ipv4 helper-address vrf default XXX.XXX.XXX.XXX
ipv4 unnumbered Loopback561
local-proxy-arp
encapsulation dot1q 561
