Optics and Optical Networking

Hello Community! Thanks in advance for your attention! We have a problem at the configuration between ASR router and FEX switch, both joined with SFP fiber. We need to hard-coded the interface to 1G. A new equipment will be inserted between them and ...

I am migrating from an ASR9001 to ASR9901. Have a 3rd party 40G-ER optic that works in 9001 but not 9901. Used "transceiver permit pid all" command on both. The 9901 complains about the type (not the pid). There is a conmand "transceiver permit type ...

Hi,I am using a server vendor provided QSFP+ breakout cable (something like this) in which one end is connected to a 2U server and 2 out of other 4 ends need to go into a layer-3 device (remaining 2 are unused at this stage). I got a cisco 3560-X wit...

People say you should use the MinTX when calculating loss budget, if so, what is the Max TX used for? The QSFP-40G-ER4 has a MaxTX of 4.5, but a MinTX of -2.7. Can I use the MaxTX of 4.5 & MaxRX of -21.2 to create a loss budget of -25.7? or is this b...

Hello, I´m using a pair of two C9500-48Y4C running as a SV-cluster. We are currently running on 16.12.1 and want to connet a N9K-C93180YC-FX3 using QSFP-H40G-CU3M cable. As i can see from the Optics Compatibility Martrix, it should be supported in 16...

Hi All, I have plan to connect 2 port RJ45 and 1 port SFP on switch C9300-24P-A, so I choose module C9300-NM-4G and transceiver  GLC-LH-SMD + GLC-TE However I don't know these transceiver can work together same module ? Please advise. Thanks  

Can I connect simplex(single fiber) to GLC-LH-SMD SFP?

HiI have two switches on two ends where Transceivers are installed that support upto Tx 1310 nm and Rx 1490 nmCable indoor connected to them supports 1310 nm and the cable Outside supports 1510 nm. Will the data transmission work? Thank you

I have a big network on which switches are connected with single-mode SFP-LR fiber 10G fiber and only a few are on GE, So I want to implement on uplink ports to mitigate or stop the broadcast traffic as below interface TenGigabitEthernet1/1/1storm-co...

I have a Cisco C-9300-24-E WITH a c-9300NM2Q Network interface card which is 40G, will this module be backwards compatible with any lower module, such as the 1G,10G or 25G network card. Will they work together?

HI therei was wondering if i can upgrade my 2960-X : Catalyst 2960X-48LPS-L  with a C2960X-FIBER-STK or a C2960X-HYBRID-STK to do some network operations (from the sfp+ ports) with a non-cisco device ?https://www.cisco.com/c/en/us/td/docs/switches/la...

after reloading C9300 switch (version 17.6.4), interface te1/1/4 go to down state, and log display: %SFF8472-3-READ_ERROR: Te1/1/4: Error reading DOM data from transceiver if I unplug / plug cable in Te1/1/4, interface go back TO UP state. (it is not...