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-rw-r--r--src/vnet/interface_output.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/vnet/interface_output.c b/src/vnet/interface_output.c
index a013810de4b..bb97493a756 100644
--- a/src/vnet/interface_output.c
+++ b/src/vnet/interface_output.c
@@ -1000,7 +1000,8 @@ format_vnet_error_trace (u8 * s, va_list * va)
CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
- s = format (s, " rx:%d", t->sw_if_index);
+ s = format (s, "rx:%U", format_vnet_sw_if_index_name,
+ vnet_get_main (), t->sw_if_index);
return s;
}