09-06-2006 04:06 AM - edited 03-03-2019 04:50 AM
I read this note from Cisco...
"The switch sends keepalive messages (to ensure the connection is up) only on interfaces that do not have small form-factor pluggable (SFP) modules."
http://www.cisco.com/en/US/products/ps6406/products_configuration_guide_chapter09186a00805a762d.html
My question is this...
I have a 2960G switch, which has four "dual" interfaces. You either have a choice to use the SFP module, or a regular CAT5 cable for each of those interfaces.
If you use the CAT5 (RJ45) port instead of the SFP module, will it send keepalive messages?
09-06-2006 06:07 AM
this is correct.
if you use the RJ-45 port, then your STP keepalives will be sent.
perhaps due to the SFP is expected to be used as a TRUNK/UPLINK therefore using BPDUs and not keepalives. still researching why.....will post when i find why.
09-06-2006 11:10 AM
oops..meant keepalives will be sent. (not stp keepalives)
stp uses BPDU's and these will also be sent.
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