SG200-18: backing up config not working properly

Timo Kokkonen · ‎06-10-2011

PID VID: SLM2016T V01

Firmware Version: 1.0.0.19

Is this known bug that you cannot backup (export) full running or startup config from this switch? Will this be fixed in next firmware? (btw, still no new firmware with CDP support for this script altough sales literature mentions that it should have already been available...)

Switch does let you backup configuration as text file (which looks similar to normal IOS config syntax), but it doesn't contain all settings so the file is pretty much useless to restoring the config to another switch.

At least following settings are missing from the file:

- management interface config (including DNS settings)

- passwords

- remote syslog server config

- SNTP server config

- IGMP config

- LLDP config

...

Below is a sample config which clearly is missing lot of stuff:

spanning-tree priority 4096

interface ethernet g1

description "switch1"

exit

interface ethernet g2

description "switch2"

exit

interface ethernet g3

description "server1"

exit

interface ethernet g9

description "switch3"

exit

interface ethernet g10

description "PC"

exit

interface ethernet g17

description "router1"

exit

interface ethernet g18

description "router2"

exit

interface range ethernet g(1,9)

flowcontrol auto

exit

port jumbo-frame

bridge multicast filtering

interface range ethernet g(1,9)

switchport default-vlan tagged

exit

interface range ethernet g(1,9)

switchport mode general

exit

interface range ethernet g(2-8,10-18)

switchport mode access

exit

vlan database

vlan 100

exit

interface range ethernet g(10-16,18)

switchport access vlan 100

exit

interface range ethernet g(1,9)

switchport general allowed vlan add 100

exit

interface vlan 100

name data

exit

interface range ethernet g(1,9)

switchport general acceptable-frame-type tagged-only

exit

voice vlan oui-table add 0001e3 Siemens_AG_phone________

voice vlan oui-table add 00036b Cisco_phone_____________

voice vlan oui-table add 00096e Avaya___________________

voice vlan oui-table add 000fe2 H3C_Aolynk______________

voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone

voice vlan oui-table add 00d01e Pingtel_phone___________

voice vlan oui-table add 00e075 Polycom/Veritel_phone___

voice vlan oui-table add 00e0bb 3Com_phone______________

David Carr · ‎06-14-2011

Timo,

Yeah, I agree with you that the settings you have configured should be displayed on the output of the config.

If you already have that is fine, please call into the SBSC at 866-606-1866 and let a support engineer troubleshoot and document what is happening. Then they can test the settings and see if they replicate the same issue.

If so, then we can go forward with getting this issue resolved.

Thank you

Timo Kokkonen · ‎06-14-2011

I opened ticket yesterday and heard that the're been similar issues where setting "special" characters in VLAN names can cause export(backup) of the config fail on older Smart Switches. That got me thinking that this must be caused by some particular configuration setting I had made.

I rebooted the switch into factory settings and started configuring it step by step, while testing the export (or backup as the GUI calls it) of the configuration after each step. I found out that after changing "Interface VLAN Mode" for any port from the default "Trunk" to "General" (and apparently even setting it to "Access" triggers same bug), export of the configuration starts failing.

Kicker is, that there appears to be no way to recover from that state, setting the port/interface back to Trunk won't help, only way to "recover" seems to reboot to factory defaults and reconfigure (and just not ever change "Interface VLAN Mode" for any port).

Steps to replicate the problem on a SG1800-2 (fw 1.0.0.19):

reboot switch to factory settings
create VLAN 100 "data" (this step probably can be omitted)
configure VLAN settings for port g1:

[VLAN management -> Interface Settings -> g1 (edit)]

- Interface VLAN Mode: General

- Administrative PVID: 1 (default)

- Frame Type: Admit Tagged Only

- Ingress filtering: Ednable (default)

- Auto Voice VLAN Membership: disable (default)

- Voice VLAN QoS Mode: Telephony source MAC Address (default)

If you export switch config before configuring interface g1 VLAN mode, you should see somethign like:

vlan database
vlan 100
exit

interface vlan 100

name data

exit
voice vlan oui-table add 0001e3 Siemens_AG_phone________
voice vlan oui-table add 00036b Cisco_phone_____________
voice vlan oui-table add 00096e Avaya___________________
voice vlan oui-table add 000fe2 H3C_Aolynk______________
voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone
voice vlan oui-table add 00d01e Pingtel_phone___________
voice vlan oui-table add 00e075 Polycom/Veritel_phone___
voice vlan oui-table add 00e0bb 3Com_phone______________

bonjour service enable csco-sb

bonjour service enable http

hostname switch0

no passwords complexity enable

username cisco password e15d5b7c1818860e2c2a9de7dab6654c0f01da2c level 15 encrypted

But after changing port g1 VLAN settings export (backup) of config is broken:

interface ethernet g1

switchport mode general

exit
vlan database
vlan 100
exit

interface vlan 100

name data

exit

interface ethernet g1

switchport general acceptable-frame-type tagged-only

exit

voice vlan oui-table add 0001e3 Siemens_AG_phone________

voice vlan oui-table add 00036b Cisco_phone_____________

voice vlan oui-table add 00096e Avaya___________________

voice vlan oui-table add 000fe2 H3C_Aolynk______________

voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone

voice vlan oui-table add 00d01e Pingtel_phone___________

voice vlan oui-table add 00e075 Polycom/Veritel_phone___

voice vlan oui-table add 00e0bb 3Com_phone______________