How do we determine which model of SFP to procure for a particular wireless controller?
The datasheet of 5520 ctlr says:
● 2 x 10 Gigabit Ethernet interfaces or 2 x 1 Gigabit Ethernet interfaces ● Small Form-Factor Pluggable Plus (SFP+) options (only Cisco SFP+s supported), including S-Class Optics ● Small Form-Factor Pluggable (SFP) options (only Cisco SFPs supported), including S-Class Optics
However while creating the estimate, I am struggling to select an appropriate model of SFP.
Kindly let me know if I am missing something
Solved! Go to Solution.
Thanks for your post. I did already check "Cisco 5520 Wireless LAN Controller Deployment Guide" and under chapter "SFP Support"is for the module GLC-SX-MMD a asterisk (*) with the information "Needs GLC-T on Port 1.".
Does that mean you cannot insert a GLC-SX-MMD on Port 1 and Port 2? So you can just insert one in Port 2 while you having a GLC-T in Port 1?
Thanks a lot and best regards
I dont't want to mix it, I want to use 2 x GLC-SX-MMD but the note by the asterisk does not make sense for me. Why is on the GLC-SX-MMD the note "Needs GLC-T on Port 1."?
Cisco documentation is sometimes intentionally confusing to hide the shortcoming of a feature and sometimes we fail to interpret it correctly. In this case , the best I can understand is , that if a GLC-SX-MMD is being inserted in port 2 , you MUST have a GLC-T in port 1. Although, both of these are 1 Gig modules , you can't insert GLC-SX-MMD in both of the ports. Essentially , as per the guide, "The SFP installed in port 1 determines the modes for port 2 at power-up". So, it looks like the port 1 is programmed to detect only GLC-T module as a 1 Gig module to set both the ports at 1 Gig operation.
Having said that , why don't u go for SFP+ module to make full use of your investment on a 5520 WLC ? SFP-10G-SR looks to be a good option.