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How do I resolve connection issues between two 10/100Base-Tx to 100Base-Fx fast Ethernet converters
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My network at two points, A and B, have the same connection devices that have been working well until recently. A (A is the internet entry point) transmits internet to B (B is the data centre) and B distributes to other locations, ie. C, D, F,G. A and B are connected by fiber using an OLT.
I never noticed before, but since it stopped working, I only see three lights under TX blinking at both point A and B.
Obviously the two devices are not communicating, but does it mean one of them is broken?
networking
asked 3 hours ago
Masssly
163
 |Â
show 7 more comments
up vote
1
down vote
favorite
My network at two points, A and B, have the same connection devices that have been working well until recently. A (A is the internet entry point) transmits internet to B (B is the data centre) and B distributes to other locations, ie. C, D, F,G. A and B are connected by fiber using an OLT.
I never noticed before, but since it stopped working, I only see three lights under TX blinking at both point A and B.
Obviously the two devices are not communicating, but does it mean one of them is broken?
networking
asked 3 hours ago
Masssly
163
1
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
1
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
1
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
1
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
1
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago
 |Â
show 7 more comments
up vote
1
down vote
favorite
up vote
1
down vote
favorite
My network at two points, A and B, have the same connection devices that have been working well until recently. A (A is the internet entry point) transmits internet to B (B is the data centre) and B distributes to other locations, ie. C, D, F,G. A and B are connected by fiber using an OLT.
I never noticed before, but since it stopped working, I only see three lights under TX blinking at both point A and B.
Obviously the two devices are not communicating, but does it mean one of them is broken?
networking
asked 3 hours ago
Masssly
163
My network at two points, A and B, have the same connection devices that have been working well until recently. A (A is the internet entry point) transmits internet to B (B is the data centre) and B distributes to other locations, ie. C, D, F,G. A and B are connected by fiber using an OLT.
I never noticed before, but since it stopped working, I only see three lights under TX blinking at both point A and B.
Obviously the two devices are not communicating, but does it mean one of them is broken?
networking
networking
asked 3 hours ago
Masssly
163
asked 3 hours ago
Masssly
163
asked 3 hours ago
Masssly
163
asked 3 hours ago
Masssly
163
asked 3 hours ago
Masssly
163
163
1
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
1
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
1
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
1
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
1
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago
 |Â
show 7 more comments
1
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
1
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
1
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
1
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
1
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago
1
1
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
1
1
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
1
1
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
1
1
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
1
1
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago
 |Â
show 7 more comments
1 Answer
1
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oldest
votes
up vote
4
down vote
As it seems, the fiber link is down. There is no link light for 100BASE-FX on either side as you wrote. Note that usually, both sides' link lights go dark when one of the converters dies or one of the fibers fail.
Possible causes:
1) One of the converters died.
Check out with a spare converter or any other device speaking 100BASE-FX. For a quick test, disconnect the 100BASE-TX side from the network (unless you've got STP active) and use an SC-SC patch cable to connect a converter to itself, it should link with itself. (Some converters require that the 100BASE-TX is linked though.) Looking at the transmitter side even through a digicam is useless due to -FX's long 1300 nm wavelength.
2) The fiber is broken
If a spare/test device links on both converters but not across the fiber, the latter is disrupted. Check the patch cables for damage or tight bends - single-mode is especially sensitive to an undercut bend radius.
Generally, it's a good idea to use pluggable transceivers in managed switches. If you use SFP transceivers with DOM (digital optical monitoring) in a managed switch you can monitor the transmitted and received power on the link.
While you're at it you might want to go for 1000BASE-LX (it looks like you've got single-mode fiber). You might also want to go for 1000BASE-BX and run two links aggregated with failover capability - there are many very affordable 3rd-party transceivers around. -BX is also a solution when one fiber has failed but can't be replaced and the other still works.
answered 3 hours ago
Zac67
21.8k21250
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
As it seems, the fiber link is down. There is no link light for 100BASE-FX on either side as you wrote. Note that usually, both sides' link lights go dark when one of the converters dies or one of the fibers fail.
Possible causes:
1) One of the converters died.
Check out with a spare converter or any other device speaking 100BASE-FX. For a quick test, disconnect the 100BASE-TX side from the network (unless you've got STP active) and use an SC-SC patch cable to connect a converter to itself, it should link with itself. (Some converters require that the 100BASE-TX is linked though.) Looking at the transmitter side even through a digicam is useless due to -FX's long 1300 nm wavelength.
2) The fiber is broken
If a spare/test device links on both converters but not across the fiber, the latter is disrupted. Check the patch cables for damage or tight bends - single-mode is especially sensitive to an undercut bend radius.
Generally, it's a good idea to use pluggable transceivers in managed switches. If you use SFP transceivers with DOM (digital optical monitoring) in a managed switch you can monitor the transmitted and received power on the link.
While you're at it you might want to go for 1000BASE-LX (it looks like you've got single-mode fiber). You might also want to go for 1000BASE-BX and run two links aggregated with failover capability - there are many very affordable 3rd-party transceivers around. -BX is also a solution when one fiber has failed but can't be replaced and the other still works.
answered 3 hours ago
Zac67
21.8k21250
add a comment |Â
up vote
4
down vote
As it seems, the fiber link is down. There is no link light for 100BASE-FX on either side as you wrote. Note that usually, both sides' link lights go dark when one of the converters dies or one of the fibers fail.
Possible causes:
1) One of the converters died.
Check out with a spare converter or any other device speaking 100BASE-FX. For a quick test, disconnect the 100BASE-TX side from the network (unless you've got STP active) and use an SC-SC patch cable to connect a converter to itself, it should link with itself. (Some converters require that the 100BASE-TX is linked though.) Looking at the transmitter side even through a digicam is useless due to -FX's long 1300 nm wavelength.
2) The fiber is broken
If a spare/test device links on both converters but not across the fiber, the latter is disrupted. Check the patch cables for damage or tight bends - single-mode is especially sensitive to an undercut bend radius.
Generally, it's a good idea to use pluggable transceivers in managed switches. If you use SFP transceivers with DOM (digital optical monitoring) in a managed switch you can monitor the transmitted and received power on the link.
While you're at it you might want to go for 1000BASE-LX (it looks like you've got single-mode fiber). You might also want to go for 1000BASE-BX and run two links aggregated with failover capability - there are many very affordable 3rd-party transceivers around. -BX is also a solution when one fiber has failed but can't be replaced and the other still works.
answered 3 hours ago
Zac67
21.8k21250
add a comment |Â
up vote
4
down vote
up vote
4
down vote
As it seems, the fiber link is down. There is no link light for 100BASE-FX on either side as you wrote. Note that usually, both sides' link lights go dark when one of the converters dies or one of the fibers fail.
Possible causes:
1) One of the converters died.
Check out with a spare converter or any other device speaking 100BASE-FX. For a quick test, disconnect the 100BASE-TX side from the network (unless you've got STP active) and use an SC-SC patch cable to connect a converter to itself, it should link with itself. (Some converters require that the 100BASE-TX is linked though.) Looking at the transmitter side even through a digicam is useless due to -FX's long 1300 nm wavelength.
2) The fiber is broken
If a spare/test device links on both converters but not across the fiber, the latter is disrupted. Check the patch cables for damage or tight bends - single-mode is especially sensitive to an undercut bend radius.
Generally, it's a good idea to use pluggable transceivers in managed switches. If you use SFP transceivers with DOM (digital optical monitoring) in a managed switch you can monitor the transmitted and received power on the link.
While you're at it you might want to go for 1000BASE-LX (it looks like you've got single-mode fiber). You might also want to go for 1000BASE-BX and run two links aggregated with failover capability - there are many very affordable 3rd-party transceivers around. -BX is also a solution when one fiber has failed but can't be replaced and the other still works.
answered 3 hours ago
Zac67
21.8k21250
As it seems, the fiber link is down. There is no link light for 100BASE-FX on either side as you wrote. Note that usually, both sides' link lights go dark when one of the converters dies or one of the fibers fail.
Possible causes:
1) One of the converters died.
Check out with a spare converter or any other device speaking 100BASE-FX. For a quick test, disconnect the 100BASE-TX side from the network (unless you've got STP active) and use an SC-SC patch cable to connect a converter to itself, it should link with itself. (Some converters require that the 100BASE-TX is linked though.) Looking at the transmitter side even through a digicam is useless due to -FX's long 1300 nm wavelength.
2) The fiber is broken
If a spare/test device links on both converters but not across the fiber, the latter is disrupted. Check the patch cables for damage or tight bends - single-mode is especially sensitive to an undercut bend radius.
Generally, it's a good idea to use pluggable transceivers in managed switches. If you use SFP transceivers with DOM (digital optical monitoring) in a managed switch you can monitor the transmitted and received power on the link.
While you're at it you might want to go for 1000BASE-LX (it looks like you've got single-mode fiber). You might also want to go for 1000BASE-BX and run two links aggregated with failover capability - there are many very affordable 3rd-party transceivers around. -BX is also a solution when one fiber has failed but can't be replaced and the other still works.
answered 3 hours ago
Zac67
21.8k21250
edited 23 mins ago
answered 3 hours ago
Zac67
21.8k21250
answered 3 hours ago
Zac67
21.8k21250
answered 3 hours ago
Zac67
21.8k21250
21.8k21250
add a comment |Â
add a comment |Â
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1
Hi Masssly and welcome. How long are the fibres between A and B? My first guess would be damage to those, before suspecting the devices. What is the manufacturer and model?
– jonathanjo
3 hours ago
1
Having dealt with more than 3000 fiber converters, i can surely write, that it is common for converters to stop working suddenly.
– Cown
3 hours ago
1
I suspect your environment is better regulated than most of mine, which are usually temporary sites, where things tend to break because of feet, tools, and similar -- which means it's basically always a cable of one kind or another. 3000 is a lot of experience, do you know what part of them tends to fail?
– jonathanjo
3 hours ago
1
@jonathanjo 100BASE-FX only uses LEDs which can last for ever - but they can break, too. Burned-out receivers should be very rare due to the low power involved.
– Zac67
3 hours ago
1
Well, the most errors i've seen was after thunder storms. But i have tried to turn off and turn on a converter at least 20 times, where it did not work afterwards. 3000 is also over a span of around 12 years.
– Cown
2 hours ago