Creating Static And Dynamic Nat Rules; Creating Portmap Nat Rules; Creating Auto-Constrain Nat Rules - Extreme Networks Summit Summit24 Installation And User Manual

Creating NAT Rules

Creating Static and Dynamic NAT Rules

To create static or dynamic NAT rules, use this command:
config nat [add | delete] vlan <outside_vlan> map source [any | <ipaddress>
[/<bits>| <netmask>]] to <ipaddress> [/<mask> | <netmask> | - <ipaddress>]
This is the simplest NAT rule. You specify the outside vlan name, and a subnet of inside IP addresses,
which get translated to the outside IP address using the specified mode (static in this case). For the
outside IP addresses, you can either specify an IP address and netmask or a starting and ending IP
range to determine the IP addresses the switch will translate the inside IP addresses to. If the netmask
for both the source and NAT addresses is /32, the switch will use static NAT translation. If the netmask
for both the source and NAT addresses are not both /32, the switch will use dynamic NAT translation.
Static NAT Rule Example
config nat add out_vlan_1 map source 192.168.1.12/32 to 216.52.8.32/32
Dynamic NAT Rule Example
config nat add out_vlan_1 map source 192.168.1.0/24 to 216.52.8.1 - 216.52.8.31

Creating Portmap NAT Rules

To configure portmap NAT rules, use this command:
config nat [add|delete] vlan <outside_vlan> map source [any | <ipaddress> [/<bits>|
<netmask>]] to <ip> [/<mask> | <netmask> | - <ipaddress>] {[tcp |udp | both]
portmap {<min> - <max>}}
The addition of an L4 protocol name and the keyword tells the switch to use portmap mode.
portmap
Optionally, you may specify the range of L4 ports the switch chooses on the translated IP addresses, but
there is a performance penalty for doing this. Remember that portmap mode will only translate TCP
and/or UDP, so a dynamic NAT rule must be specified after the portmap rule in order to allow ICMP
packets through without interfering with the portmapping.
Portmap NAT Rule Example
config nat add out_vlan_2 map source 192.168.2.0/25 to 216.52.8.32 /28 both portmap
Portmap Min-Max Example
config nat add out_vlan_2 map source 192.168.2.128/25 to 216.52.8.64/28 tcp portmap
1024 - 8192

Creating Auto-Constrain NAT Rules

To create auto-contrain NAT rules, use the following command:
config nat [add|delete] vlan <outside_vlan> map source [any | <ipaddress> [/<bits>|
<netmask>]] to <ip> [/<mask> | <netmask> | - <ipaddress>] {[tcp |udp | both]
auto-constrain}
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