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3750-24TS-S error

I am getting the following error when entering a mtu configuration on this switch:

vb:: Read-only file system

I have posted the sh ver and the configuration below. Please let me know if you have ever seen this before and what the work around is. Thanks.

Switch#config t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#system mtu 1546 vb:: Read-only file system Changes to the system MTU will not take effect until the next reload is done Switch(config)#system mtu jumbo 9000 vb:: Read-only file system Changes to the system jumbo MTU will not take effect until the next reload is done Switch(config)#exit

sh ver Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version

12.2(35)SE5, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Thu 19-Jul-07 19:15 by nachen Image text-base: 0x00003000, data-base: 0x01080000

ROM: Bootstrap program is C3750 boot loader BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEC, RELEASE SOFTWARE (fc4)

Switch uptime is 1 minute System returned to ROM by power-on System image file is "flash:c3750-ipbase-mz.122-35.SE5/c3750-ipbase-mz.

122-35.SE5.bin"

cisco WS-C3750-24TS (PowerPC405) processor (revision M0) with 118784K/

12280K bytes of memory. Processor board ID CAT1122NKPD Last reset from power-on 1 Virtual Ethernet interface 24 FastEthernet interfaces 2 Gigabit Ethernet interfaces The password-recovery mechanism is enabled. --More-- =08=08=08=08=08=08=08=08=08 =08=08=08=08=08=08=08=08=08 512K bytes of flash-simulated non-volatile configuration memory. Base ethernet MAC Address : 00:1D:45:83:5D:00 Motherboard assembly number : 73-9677-10 Power supply part number : 341-0034-01 Motherboard serial number : FDO11320J0D Power supply serial number : PHI1109B17Q Model revision number : M0 Motherboard revision number : B0 Model number : WS-C3750-24TS-S System serial number : CAT1122NKPD Top Assembly Part Number : 800-25857-02 Top Assembly Revision Number : F0 Version ID : V02 CLEI Code Number : CNMV100CRE Hardware Board Revision Number : 0x01

Switch Ports Model SW Version SW Image

------ ----- ----- ----------

----------

  • 1 26 WS-C3750-24TS 12.2(35)SE5 C3750- IPBASE-M

--More-- =08=08=08=08=08=08=08=08=08 =08=08=08=08=08=08=08=08=08Conf= iguration register is 0xF

Reply to
braydonsdad
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When I save the config and restart I type this command and the mtu settings were not changed.

Switch#sh system mtu

System MTU size is 1500 bytes System Jumbo MTU size is 1500 bytes Routing MTU size is 1500 bytes Switch#

Reply to
braydonsdad

Does anyone know how to change the permissions on a file system in the Cisco OS?

Reply to
braydonsdad

What is your config register set to in show startup?

Reply to
Trendkill

it is set to 0xF

Reply to
braydonsdad

Not sure if that is your problem or not, but mine are set to 0x2102. I know config registers can restrict configuration changes, so if this isn't a production switch, I'd consider changing it. Or google it and see what you find. Either way, I manage hundred of routers/switches, and all non-labs are set to 0x2102 per the standard.

Reply to
Trendkill

I saw a post somewhere else that says 0xf is fine for your hardware (all my stuff is routers or 6500s for the most part) so perhaps my suspicion is wrong. Not sure what else would block that. I have had to set mtu to 9k in the past for an Oracle cluster on an IOS based switch, and reboot make it work fine, but it was a 3560 if I recall correctly. Hopefully someone else can point you in the right direction if I'm on the wrong track.

Reply to
Trendkill

do a show file systems, and paste the output. I'm going off of this link, still trying to figure out how to change the permissions presuming you are showing nvram as RO and not RW. Let me know.

Reply to
Trendkill

Oops, here is the link:

formatting link

Reply to
Trendkill

And you saved your configuration before reload? (copy running-config startup-config)

Reply to
make

yes

Reply to
braydonsdad
3750-24TS are 10/100.

from the command ref. guide for your ver.

Gigabit Ethernet ports operating at 1000 Mbps are not affected by the system mtu command, and 10/100-Mbps ports are not affected by the system mtu jumbo command.

can't do 9k frames on 3750 10/100, I think.

Reply to
notaccie

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