akohlsmith
Technical User
Plain-jane CopperEdge 24-port SDSL DSLAM. I'm able to set it up such that each SDSL modem in the DSLAM has an IP, but that seems wasteful to me, especially since all those head-end modems have no real need for an IP.
Reading through the documentation, it sounds like it's supposed to be possible to use ProxyArp and have a configuation where I route a block of IPs to the DSLAM's ethernet port IP, and each head-end modem is IP-less, using the IP of the upstream ethernet port.
some ascii-art:
[tt]
router ----- [eth] DSLAM [modems] ------------- [ CPE ]
A B C DEFG
[/tt]
(using private IPs, the real system will use public ones)
A - 192.168.1.1/28 and 192.168.1.33/28
B - 192.168.1.2/28
C - (no ips)
DEFG - 192.168.1.34 through .58/28
eg. customer D has an IP of 192.168.1.34/28 and a gw of 192.168.1.33. The head-end modem at C has no need for an IP in this case, and I don't waste an IP for every customer's head end modem.
I'm not interested in PPPoE at all, my customers prefer straight IP routing (as do I).
Has anyone configured one of these beasts as described?
Reading through the documentation, it sounds like it's supposed to be possible to use ProxyArp and have a configuation where I route a block of IPs to the DSLAM's ethernet port IP, and each head-end modem is IP-less, using the IP of the upstream ethernet port.
some ascii-art:
[tt]
router ----- [eth] DSLAM [modems] ------------- [ CPE ]
A B C DEFG
[/tt]
(using private IPs, the real system will use public ones)
A - 192.168.1.1/28 and 192.168.1.33/28
B - 192.168.1.2/28
C - (no ips)
DEFG - 192.168.1.34 through .58/28
eg. customer D has an IP of 192.168.1.34/28 and a gw of 192.168.1.33. The head-end modem at C has no need for an IP in this case, and I don't waste an IP for every customer's head end modem.
I'm not interested in PPPoE at all, my customers prefer straight IP routing (as do I).
Has anyone configured one of these beasts as described?