On a 3825 can I use the SFP and the fixed lan ports at the same time?

Answered Question
May 26th, 2010
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On a 3825 can I use the SFP and the fixed lan ports at the same time?

Correct Answer by Giuseppe Larosa about 7 years 18 hours ago

Hello Mark,

the answer is no


I did a test on a C3825


on int g0/0 there is the media-type command with options rj45 or sfp


on int gi0/1 there is the media-type command only with option rj45




router(config)#int gi0/1

router(config-if)#med

router1(config-if)#media-type ?

  rj45  Use RJ45 connector

 


router(config-if)#int gi0/0 

router1(config-if)#med 

router1(config-if)#media-type ?

  rj45  Use RJ45 connector

  sfp   Use SFP connector

 

this means the SFP is linked to g0/0 and that you can use one SFP and one RJ45 port at the same time


Hope to help

Giuseppe

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Correct Answer
Giuseppe Larosa Wed, 05/26/2010 - 11:55
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Hello Mark,

the answer is no


I did a test on a C3825


on int g0/0 there is the media-type command with options rj45 or sfp


on int gi0/1 there is the media-type command only with option rj45




router(config)#int gi0/1

router(config-if)#med

router1(config-if)#media-type ?

  rj45  Use RJ45 connector

 


router(config-if)#int gi0/0 

router1(config-if)#med 

router1(config-if)#media-type ?

  rj45  Use RJ45 connector

  sfp   Use SFP connector

 

this means the SFP is linked to g0/0 and that you can use one SFP and one RJ45 port at the same time


Hope to help

Giuseppe

markmarek Wed, 07/14/2010 - 11:40
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I am replacing a router with 3 lan interfaces and going to a router with 2 lan interfaces. My problem is that I need to keep all three networks separate.


I was thinking about using subinterfaces and then on the switches creating a trunk port and using private vlans to keep the traffic separated between the three networks.


What do you think?

Leo Laohoo Wed, 05/26/2010 - 15:27
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