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vyatta@vyatta# set interfaces pppoe pppoe0 ip tcp-mss mtu
vyatta@vyatta# set interfaces pppoe pppoe0 ipv6 tcp-mss mtu |
It may also be possible to force the use of baby jumbo-grams for PPPoE (i.e. using a 1508 payload packet) by setting the PPPoE interface MTU to 1500. However support for this between various vendors is not universal, nor is ISP support, and so it used one should experiment to ensure it is operating properly. If that scheme works, then there is no need to enable MSS clamping.
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