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Properly advertise that if_arge can handle long frames (if_arge is set to

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handle packets up to 1536 bytes)

This fixes the need to frag that could happen when using vlans on top of
if_arge (which is a common case for the use the switch ports as individual
NICs).

Previously to this commit any vlan setup with if_arge as parent would have
the MTU of the parent interface reduced by the size of dot1q header
(4 bytes).

Tested on TP-Link 1043ND (where the WAN port is just a switch port setup to
tag packets in a different VLAN than the LAN ports).

Reported and tested by:	Harm Weites (harm at weites.com)
This commit is contained in:
Luiz Otavio O Souza 2014-07-03 20:16:48 +00:00
parent bfae93299c
commit 4bd2c6a20d
1 changed files with 3 additions and 0 deletions
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3
sys/mips/atheros/if_arge.c
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@ -703,6 +703,9 @@ arge_attach(device_t dev)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
IFQ_SET_READY(&ifp->if_snd);
/* Tell the upper layer(s) we support long frames. */
ifp->if_capabilities |= IFCAP_VLAN_MTU;
ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;