Cloning a router

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greinedo
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Joined: 01 Feb 2016
Posts: 3

PostPosted: Thu Mar 09, 2023 12:04    Post subject: Cloning a router Reply with quote
2nd post here so still intimidated...

I just purchased 2nd hand R7000 router (to have a backup hardware) and would like to transfer all setting from my main R7000 router to this new one. I alread installed same firmware r51937 on both R7000.

Can I just use the backup function on first router and restore this file on the second router to clone the router ?

Or is there anything more complex I need to know ? Is there any risk doing so ?

Many thanks for any advise.

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Routers
2x Netgear R6250 - r51617
2x Netgear R7000 - r51937
2x Linksys WRT-54GL - r47911
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egc
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Joined: 18 Mar 2014
Posts: 12917
Location: Netherlands

PostPosted: Thu Mar 09, 2023 12:38    Post subject: Reply with quote
If it is the same router and the same buildnumber you can restore the settings.

The code-logic should prevent overwriting important unique variables e.g. MAC address etc, but I do not guarantee that Smile

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Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
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Alozaros
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Joined: 16 Nov 2015
Posts: 6447
Location: UK, London, just across the river..

PostPosted: Thu Mar 09, 2023 12:41    Post subject: Reply with quote
Back in the days, there was a thread related to your question and there ware pros and cons..
it was all about bad blocks related..however ive done this many times on my R7800 or 1043v2 Razz when testing something...

you can try it, it wont hurt, if not working reset and add settings manually..
R7000 has build in TFTP and its hard to brick... Laughing

p.s. i believe mac's are not stored in the nvram save file, but read from the routers own partition when nvram variables are restored...

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TP-Link WR740Nv1 ---DD-WRT 55630 WAP
TP-Link WR1043NDv2 -DD-WRT 55723 Gateway/DoT,Forced DNS,Ad-Block,Firewall,x4VLAN,VPN
TP-Link WR1043NDv2 -Gargoyle OS 1.15.x AP,DNS,QoS,Quotas
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Netgear XR500 --DD-WRT 55779 Gateway/DoH,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla
Netgear R7800 --DD-WRT 55819 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla
Netgear R9000 --DD-WRT 55779 Gateway/DoT,AD-Block,AP Isolation,Firewall,Forced DNS,x2VLAN,Vanilla
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Netgear R7000 --DD-WRT 55460 Gateway/SmartDNS/DoH,AD-Block,Firewall,Forced DNS,x3VLAN,VPN
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Last edited by Alozaros on Thu Mar 09, 2023 18:21; edited 1 time in total
dale_gribble39
DD-WRT Guru


Joined: 11 Jun 2022
Posts: 1952

PostPosted: Thu Mar 09, 2023 17:24    Post subject: Reply with quote
I presume you meant this thread, which does not discuss bad blocks:

[Solved] Using "Admin > Backup" and pitfalls

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greinedo
DD-WRT Novice


Joined: 01 Feb 2016
Posts: 3

PostPosted: Thu Mar 09, 2023 17:42    Post subject: Reply with quote
Thanks for the answers and the interresting link.
Seems not 100% completely safe and I was exactly suspecting this.
I need to consider if I take the risk. It's not the few euros I payed for this router, but finding good bargain R7000 again is not so easy. And TFTP I'm a bit afraid of.

_________________
Routers
2x Netgear R6250 - r51617
2x Netgear R7000 - r51937
2x Linksys WRT-54GL - r47911
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 5700

PostPosted: Thu Mar 09, 2023 17:48    Post subject: Reply with quote
Well, you can configure each router manually after hardware reset, factory defaults, or nvram erase && reboot.
Telnet username root, compare output of command nvram show. Paste output into diffchecker, notepad++ etc.

This should clear any doubts, after a few backup, erase, restore, just compare the output of nvram show again.

About TFTP use nmrpflash. R7000 has a brief time window; nmrpflash waits for right moment during power on.
Keep in mind you would not be using this to recover from a configuration problem, only to flash new firmwares.
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