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Webcast-Catalyst9k
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trunking

FDDI ports support 802.1Q and ISL encapsulation?

Thanks.

2 REPLIES

Re: trunking

Hi Friend,

FDDI ports support ISL trunking as in ISL header there is a TYPE feild and if the TYPE CODE is "0010" it is for FDDI and if it is "0000" it is for ethernet.

Dot1q on cisco switches in only for fast ethernet or gigabit ethernet I believe. I do not see any feild in dot1q header which can differentiate ethernet frame from fddi frame.

HTH

Ankur

Re: trunking

Hi!

FDDI ports support only 802.10 encapsulation.

Here is a link which would help you in configuring a trunk link on a FDDI port.

http://www.cisco.com/en/US/products/hw/switches/ps679/products_configuration_guide_chapter09186a008007f792.html#39904

Hope it helps.

Please do rate the post if you find it helpful.

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