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-rw-r--r--src/vnet/interface_format.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/interface_format.c b/src/vnet/interface_format.c
index e34b6fb62c0..304fbb8a068 100644
--- a/src/vnet/interface_format.c
+++ b/src/vnet/interface_format.c
@@ -120,7 +120,7 @@ format_vnet_hw_interface_link_speed (u8 * s, va_list * args)
{
u32 link_speed = va_arg (*args, u32);
- if (link_speed == 0)
+ if (link_speed == 0 || link_speed == UINT32_MAX)
return format (s, "unknown");
if (link_speed >= 1000000)