diff options
author | Florian Westphal <fw@strlen.de> | 2022-09-27 12:28:21 +0200 |
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committer | Florian Westphal <fw@strlen.de> | 2022-09-28 11:53:09 +0200 |
commit | df9ddef00af5ba54c027eb5425eedc2b55a22a3e (patch) | |
tree | 7b63b82cd34c5f44470d70b124a0a626eceaca62 /doc | |
parent | c3afb1d8865a724c03ea1008c82ad18a781ed043 (diff) |
doc: mention vlan matching in ip/ip6/inet families
It only works if vlan_reorder is turned off to disable the vlan tag
removal.
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/payload-expression.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/payload-expression.txt b/doc/payload-expression.txt index 106ff74c..113f5bfc 100644 --- a/doc/payload-expression.txt +++ b/doc/payload-expression.txt @@ -23,6 +23,14 @@ VLAN HEADER EXPRESSION [verse] *vlan* {*id* | *dei* | *pcp* | *type*} +The vlan expression is used to match on the vlan header fields. +This expression will not work in the *ip*, *ip6* and *inet* families, +unless the vlan interface is configured with the *reorder_hdr off* setting. +The default is *reorder_hdr on* which will automatically remove the vlan tag +from the packet. See ip-link(8) for more information. +For these families its easier to match the vlan interface name +instead, using the *meta iif* or *meta iifname* expression. + .VLAN header expression [options="header"] |================== |