ASA 5505 with block of 8 static ip's

[louis0001]

My ISP (Zen) has given me a block of 8 ip's but i need to connect via PPPoE. The ASA 5505 only allows me to put the static in as a /32 instead of a /29.

Has anybody configured an ASA with a block of 8 ip's using PPPoE before?

regards,

louis

[nkarthikeyan]

HI Louis,

That is the default behaviour of PPPoE. Even you configure that as /29 it will take it as /32 only. No worries....

Excerpt from Cisco Doc:

Subnet Mask Appears as /32

Problem

When you use the IP address x.x.x.x 255.255.255.240 pppoe setroute command, the IP address is assigned correctly, but the subnet mask appears as /32 although it is specified in the command as /28. Why does this happen?

Solution

This is the correct behavior. The the subnet mask is irrelevant in the case of the PPPoe interface; the ASA will always change it to /32.

Regards

Karthik

[louis0001]

Hi Karthik,

is there anyway that I can use the extra ip's then or are they effectively useless?

regards,

Louis

[nkarthikeyan]

Hi Louis,

That behavior is only for the IP address that you have assigned on the interface..... You can use the rest of your IP's for NAT/PAT usage purpose.

Regards

Karthik