diff options
| author | William Tu <u9012063@gmail.com> | 2017-08-22 09:40:28 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-22 14:29:30 -0700 |
| commit | 84e54fe0a5eaed696dee4019c396f8396f5a908b (patch) | |
| tree | 8f9320a4eb44ac5835e422b324bd9f49f51f22b8 /include/net/ip_tunnels.h | |
| parent | ab2fb7e3240d24c68f854aa1b972fe415d8d1b3e (diff) | |
gre: introduce native tunnel support for ERSPAN
The patch adds ERSPAN type II tunnel support. The implementation
is based on the draft at [1]. One of the purposes is for Linux
box to be able to receive ERSPAN monitoring traffic sent from
the Cisco switch, by creating a ERSPAN tunnel device.
In addition, the patch also adds ERSPAN TX, so Linux virtual
switch can redirect monitored traffic to the ERSPAN tunnel device.
The traffic will be encapsulated into ERSPAN and sent out.
The implementation reuses tunnel key as ERSPAN session ID, and
field 'erspan' as ERSPAN Index fields:
./ip link add dev ers11 type erspan seq key 100 erspan 123 \
local 172.16.1.200 remote 172.16.1.100
To use the above device as ERSPAN receiver, configure
Nexus 5000 switch as below:
monitor session 100 type erspan-source
erspan-id 123
vrf default
destination ip 172.16.1.200
source interface Ethernet1/11 both
source interface Ethernet1/12 both
no shut
monitor erspan origin ip-address 172.16.1.100 global
[1] https://tools.ietf.org/html/draft-foschiano-erspan-01
[2] iproute2 patch: http://marc.info/?l=linux-netdev&m=150306086924951&w=2
[3] test script: http://marc.info/?l=linux-netdev&m=150231021807304&w=2
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: Meenakshi Vohra <mvohra@vmware.com>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip_tunnels.h')
| -rw-r--r-- | include/net/ip_tunnels.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 520809912f03..625c29329372 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -115,6 +115,9 @@ struct ip_tunnel { u32 o_seqno; /* The last output seqno */ int tun_hlen; /* Precalculated header length */ + /* This field used only by ERSPAN */ + u32 index; /* ERSPAN type II index */ + struct dst_cache dst_cache; struct ip_tunnel_parm parms; |