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-rw-r--r--src/vnet/interface_cli.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/vnet/interface_cli.c b/src/vnet/interface_cli.c
index a901e17e413..54e0673544f 100644
--- a/src/vnet/interface_cli.c
+++ b/src/vnet/interface_cli.c
@@ -1971,7 +1971,8 @@ vnet_pcap_dispatch_trace_configure (vnet_pcap_dispatch_trace_args_t * a)
/* Classify filter specified, but no classify filter configured */
if ((a->rx_enable + a->tx_enable + a->drop_enable) && a->filter &&
- cm->classify_table_index_by_sw_if_index[0] == ~0)
+ (!cm->classify_table_index_by_sw_if_index ||
+ cm->classify_table_index_by_sw_if_index[0] == ~0))
return VNET_API_ERROR_NO_SUCH_LABEL;
if (a->rx_enable + a->tx_enable + a->drop_enable)