IS-IS Hello Padding

Table 1. IS-IS Hello Padding

Feature

Product

Release introduced

IS-IS hello padding (ability to disable)

5320 Series

Fabric Engine 8.6

5420 Series

VOSS 8.4.2

5520 Series

VOSS 8.2.7

5720 Series

Fabric Engine 8.7

7520 Series

Fabric Engine 8.10

7720 Series

Fabric Engine 8.10

VSP 4900 Series

VOSS 8.2.7

VSP 7400 Series

VOSS 8.2.7

To detect maximum transmission unit (MTU) mismatches, Intermediate System-to-Intermediate System (IS-IS) pads hello packets to the full interface MTU. All hello packets on Fabric Extend network-to-network interface (NNI) links are padded . On non-Fabric Extend point-to-point NNI links, hello packets are padded until a hello packet is received from the other side.