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2006
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10
Helpful
2
Replies

NAT on 4500. No NAT option.

Jagan1976
Level 1
Level 1

Hi guys,

Need some help here. I am connecting an internet router directly to a 6510 switch with few vlan and interface vlans setup.

However I am not able to configure NAT on the switch for the inside and outside interfaces( "ip nat inside/outside")

The switch does not have the option for NAT at all. What is the issue? License?

Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch  Software (cat4500es8-UNIVERSALK9-M), Version 03.09.00.E RELEASE SOFTWARE (fc1)
License Information for 'WS-X45-SUP8-E'
License Level: entservices Type: Permanent
Next reboot license Level: entservices
cisco WS-C4510R+E (P5040) processor (revision 2) with 4194304K bytes of physical memory.
!
interface Vlan2
description INSIDE
ip address 172.10.1.1 255.255.240.0
end
!
interface GigabitEthernet2/2
description OUTSIDE
no switchport
ip address 144.123.456.12 255.255.255.248
no ip route-cache
speed 100
duplex full

Able to ping outside :

SWITCH#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/59/60 ms
However, not able to ping from other vlans.
SWITCH#ping 8.8.8.8 so 172.10.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with a source address of 172.44.1.1
.....
Success rate is 0 percent (0/5)

SWITCH(config)#int Gi2/2
SWITCH(config)#ip nat
                                ^
% Invalid input detected at '^' marker.
2 Replies 2

Mark Malone
VIP Alumni
VIP Alumni

Hi

switches don't do NAT that's it unfortunately you need a router to perform NAT functions , catalyst don't support it all never have , some 6500s do it but 45s don't

Thanks Mark for confirming this.

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