IP prefix-list for /32 subnet (remote VPN usr)

[Kyujin Choi]

 Hi there. I would like to get expertise about

IP prefix-list

to define remote VPN users. 

 Currently, 10.1.2.0/24 is for remote VPN subnet. 

 OSPF route table has 10.1.2.x/32. Belows are examples for remote VPN routes (/32)

 10.1.2.91/32, 10.1.2.103/32, 10.1.2 11/32 etc (Basically, I need to define every /32 route of 10.1.2.x/32 by using

IP prefix-list

  How do I define each user's subnet 10.1.2.x/32 with

IP prefix-list?

Eventually I will redistribute OSPF route to BGP along with

 IP prefix-list

Thanks!

 IP prefix-list remote-vpn seq 10 permit 10.1.2.0/32   

(Is this right?)

[MHM Cisco World]

can you more elaborate?

[Kyujin Choi]

IP prefix-list remote-vpn seq 10 permit 10.1.2.0/32   

Above IP prefix contains all 10.1.2.x/32 subnet? 

[MHM Cisco World]

try this 

ip prefix-list NAME permit 10.1.2.x/24 le 32

[MHM Cisco World]

@Harold Ritter
his suggestion is better than Me,
I use Le or equal 32 <<- this meaning any prefix that bit 24 must match the prefix and have mask less than or equal 32 (if some how you have 30, not in this VPN router but in other router that make conflict)
he use ge or equal 32  <<- this meaning any prefix that bit 24 must match the prefix and have mask grater than or equal 32, BUT the 32 is greatest number so this will match only 32, and you will not face any issue in OSPF network. 

[Harold Ritter · Accepted solution]

Hi @Kyujin Choi ,

If you only want to allow all the /32 prefixes belonging to 10.1.2.0/24, you need the following

prefix-list:

IP prefix-list remote-vpn seq 10 permit 10.1.2.0/24 ge 32

Regards,