SFP ports

Hi ,
Could any one please tell me abt small form-factor pluggable (SFP) ports
? what exaclty is its function ?
regards
Neo

I think they come in different speeds. The ones I recently got were gig copper sfps. I think its main goal is to allow for fiber or copper at different speeds. say you dont want to spend the money on a totally gig switch, as they are more expensive, well you can get a 10/100 switch with 4 sfp ports in which you can place gig sfp modules to uplink over your existing copper links.
HTH

Similar Messages

  • Sizing number of SFP ports on the WLC

    Any comments on determining how many SFP ports should be utilized on a 4404? The hard limit appears to be no more the 48 APs are allowed per SFP port on the WLC. More pertinent, has anyone loaded up 48 APs per port on the WLC and what has been the result in terms of performance?
    In the Cisco WCS/WLC class, the rule-of-thumb given was to light up one SFP for every 24 access points.
    Some of the factors that I am thinking of that would impact this number are that we are intending to run only 802.11b/g (no 802.11a). That should cut the expected bandwidth coming from the APs in half (almost, not accounting for LWAP control traffic).
    Does anyone happen know what the LWAP control traffic bandwidth is (between each AP and WLC) - or at least a rule of thumb to use?
    Again, if you have run 48 APs on a single port, have there been any performance issues? Were you running both 802.11a and b/g?
    Thanks.

    There is an imposed limitation of 48 APs per port on any 440x platform to mitigate against oversubscription based on an assumption of ~20MB per AP. Obviously, dual-mode Cisco APs are capable of handling over double that in good RF environments. So take your environment, applications, and what kind of tolerance for oversubscription you have into account.
    To scale beyond 48 ports, you have 2 options:
    1. Use LAG on the controller
    2. Use multiple AP Manager interfaces (each assigned to a different port)
    I usually recommend you go with option 1 if possible, if only because it's simpler. The WLC handles the load-balancing of traffic across the ports dynamically.
    For (2), keep in mind that LWAPP will dynamically load balance the APs across the AP managers. So be careful because you're still statically mapping your dynamic WLAN interfaces to a port on the WLC. The traffic has to go in and go out of the controller so you could potentially oversubscribe a port.

  • 2960x - stack cables connected while switches power on. SFP ports - status unknown

    Connected 2960x uplink using SFP ports both stacks and all 4 ports worked good.
    Remote tech connected last stack cable between first and last switch, in 2 different 2960x stacks of switches, while switches were  powered on. A longer stack cable was needed.  3 of 4 SFP ports did stopped communicating.
    One stack SFP stayed up in switch 2, not master.  Completed reload - other SPF connected in switch 4/0/52
    Second stack no connection on either SFP, remote tech power cycled switches.
    After power cycle one SFP worked  in Master 1/0/52, other switches SFP ports show "unknown" when inserting SFP.
    Configured port 48 on stack with issue and connected second uplink just fine.
    Has anyone experienced this with the SFP's?
    - GLC-T  P/N 30-1410-03
    Looking for documentation on reccommending procedure for connecting stack cables while switches should be powered off or not.
    Thanks,

    Opened Cisco TAC case.  the following bug was found.
    the two different HBRN's below require 2 different IOS and they cannot be in same stack.
     https://tools.cisco.com/bugsearch/bug/CSCur56395
    switch#sh ver | s Hardware Board
    Hardware Board Revision Number  : 0x05
    switch#remote command 2 sh ver | s Hardware Board
    Switch : 2 :------------ Hardware Board Revision Number  : 0x05
    switch#remote command 3 sh ver | s Hardware Board
    Switch : 3 : ------------ Hardware Board Revision Number  : 0x12
    switch#remote command 4 sh ver | s Hardware Board
    Switch : 4 :------------Hardware Board Revision Number  : 0x12
    From Cisco.
    Developers have recommended to upgrade the IOS version of switches with a Hardware Board revision Number below 0x10 to the release 15.0(2.0).EX5ES. this is the one attached to this email and should be applied to switch 1 and 2.
    For switches with a Hardware Board revision Number above 0x10 to the release 152-2.4.E1ES, which I will send you right away. This should be done on switch 3 and 4.
    Now, If you  load the engineering special, you will  need to do a full power-cycle (physically unplug the power and plug it back in for every single switch). A simple ‘reload’ will not resolve this.
    The same must be done on Switch-0. For this stack you will only need to load the image attached to this email since all the Hardware Board revision Numbers are lower than 0x10.
    done.

  • Link Fail Alarm - SFP Ports

    Hello,
    I have been trying to configure the Link Fail Alarm on SFP ports for a Cisco CGS2520 (Cisco CGS-2520-16S-8PC).
    SFP: GLC-FE-100FX-RGD (10-2360-02).
    I can create a new Alarm Profile and attach it to the Ports that I want to monitor. The update Profile can then be saved to the startup-config and the configuration can be viewed as being correct.
    If I then pull a fibre cable the Alarm is generated as expected.
    However when I reboot the Switch the Alarm Profile is still within the configuration but it is no longer attached to the ports (i.e. the Alarm Profile configuration is shown on the startup-config however the running-config does not contain the alarm profile on the SFP port). Therefore when the Fibre Cable is removed no alarm is generated.
    I have run through the procedure as defined in Chapter 7 of the Cisco CGS2520 Configuration Guide and as stated above copied the running-config to the startup-config.
    Is anyone able to advise why the port attachment is lost when the switch is restarted – the Alarm Profile is retained.
    Thank you,
    Darsh

    Hello,
    I have been trying to configure the Link Fail Alarm on SFP ports for a Cisco CGS2520 (Cisco CGS-2520-16S-8PC).
    SFP: GLC-FE-100FX-RGD (10-2360-02).
    I can create a new Alarm Profile and attach it to the Ports that I want to monitor. The update Profile can then be saved to the startup-config and the configuration can be viewed as being correct.
    If I then pull a fibre cable the Alarm is generated as expected.
    However when I reboot the Switch the Alarm Profile is still within the configuration but it is no longer attached to the ports (i.e. the Alarm Profile configuration is shown on the startup-config however the running-config does not contain the alarm profile on the SFP port). Therefore when the Fibre Cable is removed no alarm is generated.
    I have run through the procedure as defined in Chapter 7 of the Cisco CGS2520 Configuration Guide and as stated above copied the running-config to the startup-config.
    Is anyone able to advise why the port attachment is lost when the switch is restarted – the Alarm Profile is retained.
    Thank you,
    Darsh

  • Is there an SG300 or SG500 that has all ports as SFP ports?

    Is there an SG300 or SG500 that has all ports as SFP ports?
    Thanks

    Hi Alan, actually yes, there is. Much to my surprise I was shipped one this week. I have a SG300-10SFP. However, I do not believe these are on the market yet since I cannot find any documentation for them.
    -Tom
    Please mark answered for helpful posts

  • 3548-XL-EN to switch with small form-factor pluggable (SFP) ports

    Is it possible to connect my 3548 with a WS-G5484 directly to a 3560-24TS
    with small form-factor pluggable (SFP) port?
    thanks

    Yes.. You will need a LC-SC connector. The part number for a 10-Meter Fiber Multimode SX LC-to-SC Connectors is "CSS5-CABSX-LCSC"

  • CGS-2520-16S-8PC only half of SFP Ports forwarding Traffic

    HI all,
    we have two CGS-2520-16S-8PC with links in different directions. All SFP Ports are UP but only the half of it forwarding Traffic. We need all Ports .
    In one of the Cisco documents I found this hind : "The100BASE-FX SFP ports and the 10/100 PoE ports are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2) on the left. Port 3 is above port 4, and so on. The dual-purpose ports are numbered 1 and 2. "
    But more about it is not found in the documemnts. So i have no clue how to bring all Ports to forward traffic.
    Have some one an idea ?
    Philipp

    Sorry but a gigabit-only transceiver will not work on 100 Mbps-only SFP ports.
    There's almost always a good reason why something is not listed in the compatibility table.

  • Configuring a 5508 via the SFP ports

    Is there anyway to configure a 5508 via the SFP ports?  Or do you have to use the service port for autoinstall or NCS auto provisioning?  It looks like it grabs a DHCP address but it doesn't seem to like telnet,ssh ,http or https.  There isn't anyone onsite.

    Thanks,  I got it figured out.  The 5508 was plugged up to a switch that was configured for lag (for the 5508 that was hooked up before).  I changed the port channel to put the native vlan on one that hands out DHCP.  The blank 5508 grabbed an ip but wasn't working.  I ended up disabling the other ports connecting to the 5508.  I defaulted the switchport that was connected to the 5508's SFP port 1 and put it in the right access vlan.  I was then able to ping the IP it grabbed and http in to it.
    thanks though!

  • 20gbit Port-channels using sfp+ ports

    Hi,
    I am hoping to implement a cost affective solution that can utilise the uplinks ports on the 2960-X & XR series switch and the appropriate up/downlink modules for the 3750-X series switch
    Would anyone know if it is possible to bundle the 10gbit sfp+ ports into a 20gbit port-channel?
    Has anyone done this or could they point me in the right direction for documentation?
    Thanks

    Disclaimer
    The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
    Liability Disclaimer
    In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
    Posting
    BTW, don't forget, you only have two 10g ports per 3750X.

  • Upgradation of Switch SFP ports

    Can we use XFP transcivers in Cisco WS-C3560G-48TS-S SFP port.

    No
    You can check that on www.cisco.com/go/configmaker
    Regards
    JD

  • C2960S switches reset SFP+ ports hourly

    We have several C2960S switches that seem to reset their uplink SFP+ ports at the same time each hour. It looks like it's only a brief reset but any Cisco phones we have attached to these switches will lose their connectivity to our Subscriber and reset. Has anyone else seen this? We are running iOS 15.2(2a)E1 due to a different error we were having (%ENTROPY errors), and Cisco TAC recommended we upgrade to the latest code. I included a "sho log" to demonstrate what I'm talking about. The interface in question is Gi1/0/49 which has a GLC-T in it that uplinks to our Data Center switches.

    I see you have 2960s, but there is know bug for the 2960-X series regarding GLC-T and other SFPs.
    So, this maybe effecting your switch as well but not sure.
    here is the bug id and link:
    CSCur56395
    https://tools.cisco.com/bugsearch/bug/CSCur56395/?reffering_site=dumpcr
    HTH

  • SG500X-24 Switch SFP ports

    Hi,
    i have a question about the max number of sfp ports available on the SG500X-24 Switch. I need to configure a Stack with 2 SG500X-24 units: can i use 5G ports and have 4 SFP as network ports. In the quick start guide i read that i can use i couple for stack and only 1 couple of ports for standard network, while around Internet i read different. So my question is: can i use all the 6 SFP ports of the switches? 2 5G ports for stacking and 4 SFP ports for normal network operation ?
    Thank you,
    Roberto

    Hi Rob, the switch has 4 10 gig ports. There is also 2 5 gig ports. The 5 gig ports are combo ports meaning you can use either xg3 and xg4 OR the 5g ports.
    -Tom
    Please mark answered for helpful posts

  • SG500X-48 SFP(+) ports

    Hi everyone,
    I'm looking to pick these up for a company with a growing network. I'm, however, confused about the SFP(+) ports. Ok, so there are 4 of them that can work at 10 gigabit speed simultaneously.
    What is the purpose of the 2 additional 5 gigabit SFP ports then? Can they be used together with the 10G SFP+ ports?
    I found this in some manual:
    Non-Stacking standalone option:
    • Ports XG3/S1 and XG4/S2 available as standard network ports
    – Speed—1G or 10G
    • Port S1, S2 and 5G are not available
    • Ports XG1 and XG2 are available as standard network ports
    – Speed—1G or 10G
    So if I interpret this correctly,  then the 5G ports are only to be used with some form of stacking?
    Many thanks for confirming,
    Jeroen

    The 5 gig ports are combo ports. You can choose to use either the 5 gig or 10 gig port but not both.
    -Tom
    Please mark answered for helpful posts

  • SFP Ports on 3560 Switches

    Hi All,
    I have 3560G-24Ts-s, it contains 4 SFP based Ports, I would like to know:-
    1- What does (SFP) stand for?
    2- what does SFP based ports provide?
    thank you,

    HI
    SFP stand for small form factor pluggables.
    SFP ports are fiber interfaces u can compare them to GBICS.We can use them for connectivity between the switches as they are gigabit interfaces.
    Thanks
    Mahmood

  • SFP ports and Giga ports

    Hi all,
    I am designing a network where fiber will have a key role and I am wondering what is the max throughput of a SFP port (1000BaseSX), and why would I go for that kind of port rather than a normal Giga port...
    I have been looking around for documents and papers but nothing so far.
    Thanks to help

    Maximum throughput is based entirely on your appliance.
    Switch Performance Portable Product Sheet
    http://www.cisco.com/web/partners/downloads/765/tools/quickreference/switchperformance.pdf
    Router Performance Portable Product Sheet
    http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf
    Take note that the file is dated 2008 so I don't know how often Cisco updates these.
    Hope this helps.

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