I’d imagine it varies by vender (both BMC & network gear), but wiki has a
good summation -
*VLAN identifier (VID): a 12-bit field specifying the VLAN to which the
frame belongs. The hexadecimal values of 0x000 and 0xFFF are reserved. All
other values may be used as VLAN identifiers, allowing up to 4,094 VLANs.
The reserved value 0x000 indicates that the frame does not carry a VLAN ID;
in this case, the 802.1Q tag specifies only a priority and is referred to
as a priority tag. On bridges, VID 0x001 (the default VLAN ID) is often
reserved for a management VLAN; this is vendor-specific. The VID value
0xFFF is reserved for implementation use; it must not be configured or
transmitted. 0xFFF can be used to indicate a wildcard match in management
operations or filtering database entries.*
Basically you should avoid 0,1, and 4095 unless you know your vendor/hw
supports it for a specific reason.
— d
On Sat, Aug 6, 2016 at 6:07 AM, <b_b_si...@dell.com> wrote:
>
>
> Dear IPMI Experts,
>
>
>
> Need your help in understanding what should be value of VLAN ID value
> during VLAN disable.
>
>
>
> The spec doesn’t clearly call out what should be value of VLAN ID when
> VLAN ID enable bit is zero.
>
>
>
> As per spec…
>
> data 1
> [7:0] - Least significant 8-bits of the VLAN ID. 00h if VLAN ID not used.
> data 2
> [7] - VLAN ID enable.
> 0b = disabled, 1b = enabled. If enabled, the BMC will only accept packets
> for this
> channel if they have 802.1q fields and their VLAN ID matches the VLAN ID
> value
> given in this parameter.
> [6:4] - reserved
> [3:0] - most significant four bits of the VLAN ID
>
>
>
>
>
> I’m trying to disable the vlan id using the command “ipmitool lan set 1
> vlan id off”
>
> I get the below error.
>
> LAN Parameter Data does not match! Write may have failed.
>
>
>
> When I checked in code ipmi_lanp.c the ipmitool is sending the vlan id as
> “0 0” which is NOT accepted by the BMC.
>
>
>
> ipmi_lan_set_vlan_id(struct ipmi_intf *intf, uint8_t chan, char *string)
> {
> uint8_t data[2];
> int rc;
>
> if (string == NULL)
>
> { data[0] = 0; data[1] = 0; }
>
>
>
> But when I replace the VLAN ID value with 1-4094 along with VLAN ID
> enable bit = 0. I.e,
>
>
>
> Data[0] = xxxx xxxx
>
> Data[1] = 0xxx xxxx
>
>
>
> Then VLAN ID got disable successfully.
>
>
>
> So, my query is what is the expected value of the VLAN ID when VLAN ID
> enable bit is zero as per the spec? should be zero or 1 to 4094 range?
>
>
>
> Regards
>
> Balaji Singh
>
>
>
> ------------------------------------------------------------
> ------------------
>
> _______________________________________________
> Ipmitool-devel mailing list
> Ipmitool-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/ipmitool-devel
>
>
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