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142 lines
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<section id="frequently-asked-questions">
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<h1>Frequently Asked Questions<a class="headerlink" href="#frequently-asked-questions" title="Link to this heading"></a></h1>
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<p><strong>Outer VLAN header not captured in PCAP?</strong></p>
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<p>Some interface drivers drop the outer VLAN header. The BNG Blaster tries to
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recover the VLAN from kernel headers but will not change the packets stored
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in the PCAP file.</p>
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<p><strong>Some sessions established on BNG are not established on BNG Blaster?</strong></p>
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<p>The BNG Blaster considers a session only as established if all configured
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protocols are established. This could occur if the device under test (your BNG)
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is configured for IPv4 only but the BNG Blaster is configured for IPv4 and IPv6.</p>
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<p>The idea here is to prevent potential failures will be overseen.</p>
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<p><strong>DHCPv6 does not start for PPPoE sessions?</strong></p>
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<p>The BNG Blaster expects an ICMPv6 router-advertisement with an other-config flag
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before it starts sending DHCPv6 within a PPPoE session.</p>
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<p><strong>Why is stream length limited to 3936 bytes?</strong></p>
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<p>The stream length limit is dynamically calculated depending on the configured
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IO mode. The default mode using Packet MMAP limits the stream length to pagesize
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minus internal header and overhead (ethernet, MPLS, …) which results in 3936 bytes
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on most systems. The IO mode RAW would allow streams with up to 9000 bytes.</p>
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<p>© Copyright 2020-2024, RtBrick, Inc..</p>
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