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| author | Robert Shearman <rshearma@brocade.com> | 2015-04-22 11:14:38 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-22 14:24:54 -0400 |
| commit | 37bde79979c3862c79294c62ddcef7efc477e4bf (patch) | |
| tree | a2268a0a600ed3eb1e33df0f43bbd3c72c5e30e0 /Documentation | |
| parent | 03c57747a7020a28a200e7e920fb48ecdc9b0fb8 (diff) | |
| download | linux-37bde79979c3862c79294c62ddcef7efc477e4bf.tar.bz2 | |
mpls: Per-device enabling of packet input
An MPLS network is a single trust domain where the edges must be in
control of what labels make their way into the core. The simplest way
of ensuring this is for the edge device to always impose the labels,
and not allow forward labeled traffic from untrusted neighbours. This
is achieved by allowing a per-device configuration of whether MPLS
traffic input from that interface should be processed or not.
To be secure by default, the default state is changed to MPLS being
disabled on all interfaces unless explicitly enabled and no global
option is provided to change the default. Whilst this differs from
other protocols (e.g. IPv6), network operators are used to explicitly
enabling MPLS forwarding on interfaces, and with the number of links
to the MPLS core typically fairly low this doesn't present too much of
a burden on operators.
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Robert Shearman <rshearma@brocade.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/mpls-sysctl.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/networking/mpls-sysctl.txt b/Documentation/networking/mpls-sysctl.txt index 639ddf0ece9b..9ed15f86c17c 100644 --- a/Documentation/networking/mpls-sysctl.txt +++ b/Documentation/networking/mpls-sysctl.txt @@ -18,3 +18,12 @@ platform_labels - INTEGER Possible values: 0 - 1048575 Default: 0 + +conf/<interface>/input - BOOL + Control whether packets can be input on this interface. + + If disabled, packets will be discarded without further + processing. + + 0 - disabled (default) + not 0 - enabled |