From: Victor Cappuccio (vcappuccio@gmail.com)
Date: Tue Nov 06 2007 - 12:38:27 ART
Hi Gregory,
I had in CANTV this same issue, checking my old emails I found that
probably this link could help a lot
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_white_paper0900aecd8052870b.shtml
Also:
http://www.iphelp.ru/faq/29/cisconut2-CHP-13-SECT-3.html
http://www.cisco.com/en/US/docs/ios/12_3/ipaddr/command/reference/ip1_i2g.html#wp1079180
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftnthsrp.htm
Also be aware that CPU Process utilization and memory is critical in this
situation, using the using the following TCL Script to capture the number
of translations and using the show ip nat statistics to determine the
number of dynamic entries created in the NAT tables such as in: Active as to
Standby
proc SNAT { DURANTE interval } {
set end [expr [clock seconds] + $DURANTE]
set cur [clock seconds]
set interval "${INTEVALO}000"
while { $cur < $end } {
show clock
show IP NAT sta | inc To
show proc cpu | exc 0.00
show memory statistics
puts "\n"
after $TIEMPO
set cur [clock seconds]
}
}
My 2 cents
Victor Cappuccio
www.vcappuccio.wordpress.com
On Nov 6, 2007 3:51 PM, Gregory Gombas <ggombas@gmail.com> wrote:
> Can someone please explain what the redundancy keyword at the end of a
> static nat statement does? For example:
>
> Ip nat inside source static 10.1.123.1 192.1.1.1 redundancy HSRP-1
>
> We tried the configuration from Narkbik's NAT lab excercise #9, and we
> found that failover worked the same with or without the redundancy
> keyword:
>
> Ip nat inside source static 10.1.123.1 192.1.1.1
>
> Here is the relevant configuration:
>
> On R2
> interface FastEthernet0/0
> Standby 1 ip 10.1.123.100
> Standby 1 priority 110
> Standby 1 preempt
> Standby 1 name HSRP-1
> Standby 1 track FastEthernet0/1 50
> ip nat inside
>
> interface FastEthernet0/1
> Standby 2 ip 200.1.1.100
> Standby 2 priority 110
> Standby 2 preempt
> Standby 2 track FastEthernet0/0 50
> ip nat outside
>
> Ip nat inside source static 10.1.123.1 192.1.1.1 redundancy HSRP-1
>
>
> On R3
> Interface FastEthernet0/0
> Standby 1 ip 10.1.123.100
> Standby 1 preempt
> Standby 1 name HSRP-1
> ip nat inside
>
> Interface FastEthernet0/1
> Standby 2 ip 200.1.1.100
> Standby 2 priority 100
> Standby 2 preempt
> ip nat outside
>
> Ip nat inside source static 10.1.123.1 192.1.1.1 redundancy HSRP-1
>
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