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You're going to have to provide more information.<br />
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The title of &quot;Nexus 5548&quot; gives no information as to what you're looking for. <br />
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How do non Layer 3 devices such as l2 switches deal with MTU issues.
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What do you mean by &quot;MTU issues&quot;? &nbsp;For most Layer 2 switches, the default MTU is 1500 bytes. Frames larger than that are discarded.
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You're going to have to provide more information.

The title of "Nexus 5548" gives no information as to what you're looking for.



> How do non Layer 3 devices such as l2 switches deal with MTU issues.

What do you mean by "MTU issues"?  For most Layer 2 switches, the default MTU is 1500 bytes. Frames larger than that are discarded.

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Today's networks are jumbo capable (9216) ....hence part of a network could be jumbo capable and another portion may only provide 1500 MTU capability.<br />
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What happens when a jumbo frame crossed the boundary and egresses a &nbsp;L2 switch that can only pass packets that are 1500 bytes of smaller. &nbsp; <br />
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The Switch would then have to fragment the packet.. &nbsp;Since l2 switches don't look at the l3 header how does the fragmentation work out.
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Today's networks are jumbo capable (9216) ....hence part of a network could be jumbo capable and another portion may only provide 1500 MTU capability.

What happens when a jumbo frame crossed the boundary and egresses a  L2 switch that can only pass packets that are 1500 bytes of smaller.  

The Switch would then have to fragment the packet..  Since l2 switches don't look at the l3 header how does the fragmentation work out.

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If a layer 2 is not configured for jumbo frames, it will just discard any frames larger than 1518 bytes.
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If a layer 2 is not configured for jumbo frames, it will just discard any frames larger than 1518 bytes.

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So your saying a l2 switch will not fragment....correct?
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So your saying a l2 switch will not fragment....correct?

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How do non Layer 3 devices such as l2 switches deal with MTU issues.
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How do non Layer 3 devices such as l2 switches deal with MTU issues.

NEXUS 5548

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.