Troubleshooting ethernet port failure; rate setting
Posted: Sun Jul 05, 2015 12:05 pm
Lately (after upgrading to v6.28 and v.6.29.1) we occur several ethernet interfaces that stop passing traffic on routers that otherwise funcion normally.
Under v6.27 we started to set port rate setting to manual (instead of the OS default 'auto') because we found in multiple hop links this improves the throughput over the link (4=>10+ routers. board to board ethernet connections and wireless NV2 radio links)
But although we think to see some improvement on these link by setting all port in that link to 'manual' AND we started upgrading to 6.29.1 to get better throughput over the bridged interfaces we are now in a situation (days to week later) that some ports suddenly start to stop passing traffic. Only reboots or in some case power cycles bring them up working again.
Now we can go back in OS but maybe its more 'rate setting' related.
Some parts of the total links are also gigabit ethernet connections where at more distant towers with less traffic we still have fast ethernet.
Question1:
Would have the rate setting any impact on the throughput over two ethernet interconnected interfaces?
Q2:
Would it make such connections really more stable if set to 'manual' instead of 'auto'
Q3:
Why, and is it, really important to have both end at the same setting? (We we know actually, one 'auto' rate port connected to a 'manual rate' port don't go well. They are much more unstable and sometimes stop to work. But whould 'auto' no be smart enough to connect to 'any' kind of port?)
If someone could give us some real opinions about the port rate setting we maybe can at least leave that issue behind us...... (and go onto the os v.6.29.1 related...)
Under v6.27 we started to set port rate setting to manual (instead of the OS default 'auto') because we found in multiple hop links this improves the throughput over the link (4=>10+ routers. board to board ethernet connections and wireless NV2 radio links)
But although we think to see some improvement on these link by setting all port in that link to 'manual' AND we started upgrading to 6.29.1 to get better throughput over the bridged interfaces we are now in a situation (days to week later) that some ports suddenly start to stop passing traffic. Only reboots or in some case power cycles bring them up working again.
Now we can go back in OS but maybe its more 'rate setting' related.
Some parts of the total links are also gigabit ethernet connections where at more distant towers with less traffic we still have fast ethernet.
Question1:
Would have the rate setting any impact on the throughput over two ethernet interconnected interfaces?
Q2:
Would it make such connections really more stable if set to 'manual' instead of 'auto'
Q3:
Why, and is it, really important to have both end at the same setting? (We we know actually, one 'auto' rate port connected to a 'manual rate' port don't go well. They are much more unstable and sometimes stop to work. But whould 'auto' no be smart enough to connect to 'any' kind of port?)
If someone could give us some real opinions about the port rate setting we maybe can at least leave that issue behind us...... (and go onto the os v.6.29.1 related...)