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New Member

Ipv6 addressing

Hi guys, Need your expert advise. ISP has given me a /64 block and an ethernet link to their PE router. I have an isr router with 2 fa. I want to give each fa an ip address from the block above. I tried using subnet calculator and applied /120 on each fa. I can ping sourcing from the fa (connected to the isp cable) successfully. However sourcing from the other fa, i cant. Is there anything missing? Thanks.
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1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Hi,How is your ISP side

Hi,

How is your ISP side interface configured?. Is it with /120 mask or /64?. If it is /120, you should make sure the ISP have a return path pointing towards you.

 

if it is /64, you need to enable proxy arp in your interface towards ISP cable.

 

-Nagendra

4 REPLIES
New Member

No acls. Just plain config.

No acls. Just plain config. Im trying to ping the PE interface.
New Member

What is the output of "show

What is the output of "show ipv6 route" ?

New Member

Can you share the config?

Can you share the config?

Cisco Employee

Hi,How is your ISP side

Hi,

How is your ISP side interface configured?. Is it with /120 mask or /64?. If it is /120, you should make sure the ISP have a return path pointing towards you.

 

if it is /64, you need to enable proxy arp in your interface towards ISP cable.

 

-Nagendra

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