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| author | William Tu <u9012063@gmail.com> | 2016-06-24 07:42:30 -0700 |
|---|---|---|
| committer | Pravin B Shelar <pshelar@ovn.org> | 2016-06-24 09:17:00 -0700 |
| commit | aaca4fe0ce9e90a41b3f4db84be7d05823c733e4 (patch) | |
| tree | 501ddeb047ddb614067f89787d71bb01427bacc1 /NEWS | |
| parent | 4c7804f14b9b5bbcd37cf9170781e2f820992532 (diff) | |
| download | openvswitch-aaca4fe0ce9e90a41b3f4db84be7d05823c733e4.tar.gz | |
ofp-actions: Add truncate action.
The patch adds a new action to support packet truncation. The new action
is formatted as 'output(port=n,max_len=m)', as output to port n, with
packet size being MIN(original_size, m).
One use case is to enable port mirroring to send smaller packets to the
destination port so that only useful packet information is mirrored/copied,
saving some performance overhead of copying entire packet payload. Example
use case is below as well as shown in the testcases:
- Output to port 1 with max_len 100 bytes.
- The output packet size on port 1 will be MIN(original_packet_size, 100).
# ovs-ofctl add-flow br0 'actions=output(port=1,max_len=100)'
- The scope of max_len is limited to output action itself. The following
packet size of output:1 and output:2 will be intact.
# ovs-ofctl add-flow br0 \
'actions=output(port=1,max_len=100),output:1,output:2'
- The Datapath actions shows:
# Datapath actions: trunc(100),1,1,2
Tested-at: https://travis-ci.org/williamtu/ovs-travis/builds/140037134
Signed-off-by: William Tu <u9012063@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -15,6 +15,8 @@ Post-v2.5.0 now implemented. Only flow mod and port mod messages are supported in bundles. * New OpenFlow extension NXM_NX_MPLS_TTL to provide access to MPLS TTL. + * New output option, output(port=N,max_len=M), to allow truncating a + packet to size M bytes when outputting to port N. - ovs-ofctl: * queue-get-config command now allows a queue ID to be specified. * '--bundle' option can now be used with OpenFlow 1.3. @@ -64,6 +66,7 @@ Post-v2.5.0 - Datapath Linux kernel compatibility. * Dropped support for kernel older than 3.10. * Removed VLAN splinters feature. + * Support for truncate action. - Tunnels: * Flow based tunnel match and action can be used for IPv6 address using tun_ipv6_src, tun_ipv6_dst fields. |