On Tue, Jul 04, 2017 at 03:27:50PM +0800, Dickens Yeh wrote:
> Hi,
> I have an question, and I haven't found any OpenFlow Spec to defined it ,
> please give me a help.
>
> I am trying to work with 3 vlan tags, but it cannot match correct ethertype
> after pop 1 vlan tag.
> OVS Bridge already set with vlan-limit = 0, and it can watch over 2 vlan
> and match the correct ethertype like ARP.
>
> My question is: the packet have 3 vlan tags, pop 1 vlan tag and goto-table
> 1. In table 1, will it match with the new packet (modified) or the original
> packet like in table 0?
The OVS documentation says:
other_config : vlan-limit: optional string, containing an integer, at
least 0
Limits the number of VLAN headers that can be matched to the
specified number. Further VLAN headers will be treated as pay‐
load, e.g. a packet with more 802.1q headers will match Ethernet
type 0x8100.
Value 0 means unlimited. The actual number of supported VLAN
headers is the smallest of vlan-limit, the number of VLANs sup‐
ported by Open vSwitch userspace (currently 2), and the number
supported by the datapath.
If this value is absent, the default is currently 1. This main‐
tains backward compatibility with controllers that were designed
for use with Open vSwitch versions earlier than 2.8, which only
supported one VLAN.
It's not clear to me whether you're describing a bug. Does OVS behavior
differ from what is documented abovve?
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