misc: add vnet classify filter set support

Type: feature

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I79b216d2499df143f53977e5b70382f6f887e0bc
(cherry picked from commit f5667c3055dbd6755277f085c6778c2b1104aa6e)

1 files changed, 20 insertions, 7 deletions

diff --git a/docs/gettingstarted/developers/vnet.md b/docs/gettingstarted/developers/vnet.md
index 826af0a90a9..97336a4cdf2 100644
--- a/docs/gettingstarted/developers/vnet.md
+++ b/docs/gettingstarted/developers/vnet.md
@@ -497,6 +497,11 @@ These commands have the following optional parameters:
   on a per-paket basis. Must be >32 and less than 9000. Default value:
   512.
 
+- <b>filter</b> - Use the pcap rx / tx / drop trace filter, which must
+  be configured. Use <b>classify filter pcap...</b> to configure the
+  filter. The filter will only be executed if the per-interface or
+  any-interface tests fail.
+
 - <b>intfc _interface_ | _any_</b> - Used to specify a given interface,
   or use '<em>any</em>' to run packet capture on all interfaces.
   '<em>any</em>' is the default if not provided. Settings from a previous
@@ -521,9 +526,10 @@ These commands have the following optional parameters:
 
 ## packet trace capture filtering
 
-The "classify filter" debug CLI command constructs an arbitrary set of
-  packet classifier tables for use with "pcap rx | tx trace," and
-  (eventually) with the vpp packet tracer
+The "classify filter pcap | <interface-name> " debug CLI command
+constructs an arbitrary set of packet classifier tables for use with
+"pcap rx | tx | drop trace," and with the vpp packet tracer on a
+per-interrface basis.
 
 Packets which match a rule in the classifier table chain will be
 traced. The tables are automatically ordered so that matches in the
@@ -540,17 +546,24 @@ and match values. If a classifier table with a suitable mask already
 exists, the CLI command adds a match rule to the existing table.  If
 not, the CLI command add a new table and the indicated mask rule
 
-### Configure a simple classify filter
+### Configure a simple pcap classify filter
 
 ```
-    classify filter mask l3 ip4 src match l3 ip4 src 192.168.1.11"
+    classify filter pcap mask l3 ip4 src match l3 ip4 src 192.168.1.11"
     pcap rx trace on max 100 filter
 ```
 
-### Configure another fairly simple filter
+### Configure a simple interface packet-tracer filter
+
+```
+    classify filter GigabitEthernet3/0/0 mask l3 ip4 src match l3 ip4 src 192.168.1.11"
+    [device-driver debug CLI TBD]
+```
+
+### Configure another fairly simple pcap classify filter
 
 ```
-   classify filter mask l3 ip4 src dst match l3 ip4 src 192.168.1.10 dst 192.168.2.10
+   classify filter pcap mask l3 ip4 src dst match l3 ip4 src 192.168.1.10 dst 192.168.2.10
    pcap tx trace on max 100 filter
 ```