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New Member

Giants on a 2900 trunk port

I have a 2900 switch that is connected via an ISL trunk to a 5505 switch. Only the 2900 is showing giants on it's trunk interface.

What could the possible causes be?

  • Other Network Infrastructure Subjects
3 REPLIES
Anonymous
N/A

Re: Giants on a 2900 trunk port

An Ethernet packet that is greater than 1518 bytes is considered a giant, so there are frames exceeding that length in your LAN.

New Member

Re: Giants on a 2900 trunk port

even though the above definition is true. This occurs between a connection between two switch.

Most likely you are running into

CSCdm34557

A C2900XL may report a significant number of oversize frames.

When a legal max-size ethernet frame encapsulated/tagged for ISL/802.1Q

is received on a C2900XL and the packet is not forwarded to any other

ports, the frame is counted as an oversize frame in the statistics

counters. (There are many valid reasons for a packet to be received

and not forwarded to any other ports. For example, packets received

in a port blocked by STP will not be forwarded.)

There is no workaround for this bug, but it is cosmetic only and

can be ignored. There are no plans to modify the ASIC which contains

this bug, however if the ASIC is modified for other reasons, the bug

will be fixed.

New Member

Re: Giants on a 2900 trunk port

even though the above definition is true. This occurs between a connection between two switch.

Most likely you are running into

CSCdm34557

A C2900XL may report a significant number of oversize frames.

When a legal max-size ethernet frame encapsulated/tagged for ISL/802.1Q

is received on a C2900XL and the packet is not forwarded to any other

ports, the frame is counted as an oversize frame in the statistics

counters. (There are many valid reasons for a packet to be received

and not forwarded to any other ports. For example, packets received

in a port blocked by STP will not be forwarded.)

There is no workaround for this bug, but it is cosmetic only and

can be ignored. There are no plans to modify the ASIC which contains

this bug, however if the ASIC is modified for other reasons, the bug

will be fixed.

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