03-03-2006 03:34 AM - edited 03-03-2019 11:56 AM
Please,
In my router, the nat increase the use of cpu. I don't know if the tuning of nat can help us to decrease it. If yes, how can i configure nat tuning ?
Regards.
03-03-2006 03:41 AM
What release of IOS are you using. NAT should not really be that taxing on the router.
IMO Release 12.3 and higher support translation type supports which would lead to more optimized nat translation tables.
HTH
03-03-2006 04:57 AM
Globalnet_sat3#sh version
Cisco IOS Software, 2801 Software (C2801-IPBASE-M), Version 12.3(8)T4, RELEASE S
OFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2004 by Cisco Systems, Inc.
Compiled Fri 03-Sep-04 00:01 by eaarmas
ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)
Globalnet_sat3 uptime is 1 week, 3 days, 17 hours, 20 minutes
System returned to ROM by bus error at PC 0x60C2001C, address 0x136D4 at 19:37:3
3 UTC Mon Feb 20 2006
System image file is "flash:c2801-ipbase-mz.123-8.T4.bin"
cisco 2801 (revision 4.1) with 118784K/12288K bytes of memory.
Processor board ID FHK084010J9
2 FastEthernet interfaces
2 Serial interfaces
2 Channelized E1/PRI ports
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
62592K bytes of ATA CompactFlash (Read/Write)
please, how can i optimise nat ??
Regards.
03-03-2006 06:39 AM
You already seem to have IOS 12.3 so upgrading it further may not lead to substantial improvements.
By optimizing NAT what exactly do you mean ? If youre looking at a whole load of traffic hitting the router at once, you might wanna take a shot at recommending a router upgrade or just upgrading the speeds of the interface if youre talking about speeds at which NAT happens... this is very subjective and can be justified only by constantly high processor loads. Im gonna have to ask you for more details on what your configuration looks like and what part of it are you looking to optimize?
03-03-2006 07:35 AM
I configure nat overload, with about 1.5M of traffic
traffic coming from translation.And about 4M for global traffic.
Regards.
03-04-2006 05:57 AM
i can resolve it with nat tuning. with " ip nat translation icmp-timeout , ip nat translation tcp-timeout, ip nat translation udp-timeout, etc.. "
Any suggest will be appreciated.
Regards.
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