For SNA/APPC. The maximum RU size parameter of the configuration can have a significant bearing on productivity. On a typical packet-switched network, using an RU size of 256 should yield the best performance. For other network environments, a larger RU size will yield better performance when sending large amounts of data. To increase the RU size on a token ring link, increase the frame size to support the largest RU sent.
Note: The maximum RU size (and frame size for token ring environments) on the partner side must match the sizes specified on the local side. Otherwise, the value is negotiated downwards.
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