[mrtg] IP Changes on WAN - But keep exisitng data

[Naveen Sivenandan]

Hi,,
 
I am monitoring a network with about 20 Cisco routers. We have data from
January this year.There has been a request to change all the IP addresses on
all devices to a private addresse scheme.I need to keep the history for the
routers, How do I keep the devices from not losing the history after they
are cut over to the new ip adresses.
 
Eg: Exisiting ip is 193.0.5.x 
      New ip is to be changed to 10.0.5.x
 
Exisiting config script - 
### Interface 1 >> Descr: 'Ethernet0' | Name: 'Et0' | Ip: '193.0.91.1' |
Eth: '00-04-dd-6d-e0-0b' ###
 
Target[193.0.5.14_1]: @193.0.5.14: <mailto:1:bm-pub at 193.0.5.14:> 
SetEnv[193.0.5.14_1]: MRTG_INT_IP="193.0.91.1" MRTG_INT_DESCR="Ethernet0"
MaxBytes[193.0.5.14_1]: 1250000
Title[193.0.5.14_1]: Traffic Analysis for 1 -- Bman-ABC
PageTop[193.0.5.14_1]: <H1>Traffic Analysis for 1 -- Bman-ABC</H1>
 <TABLE>
   <TR><TD>System:</TD>     <TD>Bman-ABC in </TD></TR>
   <TR><TD>Maintainer:</TD> <TD></TD></TR>
   <TR><TD>Description:</TD><TD>Ethernet0 connected to ABC </TD></TR>
   <TR><TD>ifType:</TD>     <TD>ethernetCsmacd (6)</TD></TR>
   <TR><TD>ifName:</TD>     <TD>Et0</TD></TR>
   <TR><TD>Max Speed:</TD>  <TD>1250.0 kBytes/s</TD></TR>
   <TR><TD>Ip:</TD>         <TD>193.0.91.1 ()</TD></TR>
 </TABLE>
 

### Interface 2 >> Descr: 'Serial0' | Name: 'Se0' | Ip: '' | Eth: '' ###
 
Target[193.0.5.14_2]: @193.0.5.14: <mailto:2:bm-pub at 193.0.5.14:> 
SetEnv[193.0.5.14_2]: MRTG_INT_IP="" MRTG_INT_DESCR="Serial0"
MaxBytes[193.0.5.14_2]: 193000
Title[193.0.5.14_2]: Traffic Analysis for 2 -- Bman-ABC
PageTop[193.0.5.14_2]: <H1>Traffic Analysis for 2 -- Bman-ABC</H1>
 <TABLE>
   <TR><TD>System:</TD>     <TD>Bman-ABC in </TD></TR>
   <TR><TD>Maintainer:</TD> <TD></TD></TR>
   <TR><TD>Description:</TD><TD>Serial0  </TD></TR>
   <TR><TD>ifType:</TD>     <TD>frame-relay (32)</TD></TR>
   <TR><TD>ifName:</TD>     <TD>Se0</TD></TR>
   <TR><TD>Max Speed:</TD>  <TD>193.0 kBytes/s</TD></TR>
 </TABLE>



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