WS-12-250-DC 1560MTU Data stops

[rkelly1]

Chris - One of our WS-12-250-DC units 1.4.7, connected via sfp/fiber to a MT 2011 router.



When I change the WS sfp port to 1560mtu the port won't pass any data. Other ports on WS are 1560 w/ no issues. Ports on MT are 1560 w/no issues. This is the same exact setup we use at other towers with no issue.

I'm not completely sure if it's the WS, but data stops only when this port is changed on WS from default 1528 to 1560 (haven't tried other values.).

Do you have any insight or know why this would happen?

It's the same sfp module we use on other towers, not sure if an sfp module would care about mtu...

Thanks

[lligetfa]

...not sure if an sfp module would care about mtu...

There was another recent thread where a particular SFP would not do jumbo packets. I would try a different model SFP or at least mention which model you use so Eric et al can test if he has one.

[sirhc]

As well can not understand why you would not be running the latest code which is v1.4.8rc12 or newer.

RC does not mean Release Candidate. It is simply a throwback naming scheme which we have said a million times on the forums.

All the reported bugs since v1.4.7 was released have been fixed in v1.4.8rc12 or newer.

Not saying this will fix your issue, just saying you should be running newer code as what you are running is 6 months old with many known bugs that have all been fixed.

NOTE: MSTP is still being tested so use MSTP at your own risk.

FIXED/CHANGED
- Fixed input voltage reading on SMART DC models that may cause false ;pw input reading if voltage momentarily drop - RC12
- Fixed Changed temp sensor readings on SMART DC models to effect fan speeds - RC2
- Fixed SNMP support for Q-SWITCH-MIB, LLDP and CDP - RC7
- Fixed IGMP snooping with multiple VLANs - RC9
- Fixed DC calibration restarting POE - RC10
- Fixed problem with DHCP snooping affecting fragmented UDP packets - RC10
- Fixed problem with ERPS enabling forwarding a failed port - RC10
- Fixed problem with MSTP setting priority and path cost - RC10
- Fixed SSH login with RADIUS when the password contains special characters - RC11
- Fixed scheduled port bounce - RC11
- Fixed VLAN drag/drop being too sensitive - RC12
- Grey out unavailable bulk poe options - RC3
- Upper out of voltage range for IDC is now 54V - RC4

ENHANCEMENTS
- Added ERPS protocol implementation is g.8032v2 - Ring Protection - RC1
- Added BETA note to ERPS - RC3
- Added port name to "show interface status" CLI command - RC3
- Added an input voltage calibration for DC models - RC4
- Improved Q-BRIDGE-MIB support - RC5
- Improved fan control on DC models - RC6
- Improved stability of ERPS- RC6
- Added "Enable Power" action to watchdog - RC8
- Added ifMtu to IF-MIB - RC10
- Added dot3StatsDuplexStatus from EtherLike-MIB - RC10
- Added the time counters were cleared to port detail - RC10
- Added watchdog description to email notification - RC10
- Added terminal length option to CLI - RC10
- Added ability to re-order VLANs using drag and drop - RC10
- Enabled IGMP proxy for IGMP snooping - RC11
- Added "show igmp" CLI command - RC11


KNOWN ISSUES
- Some language templates need help - please private message Eric Stern to help

v1.4.8rc1 Released 5/9/2017
v1.4.8rc2 Released 5/11/2017
v1.4.8rc3 Released 5/15/2017
v1.4.8rc4 Released 5/23/2017
v1.4.8rc5 Released 5/26/2017
v1.4.8rc6 Released 6/7/2017
v1.4.8rc7 Released 6/17/2017
v1.4.8rc10 Released 9/10/2017
v1.4.8rc11 Released 9/22/2017
v1.4.8rc12 Released 10/18/2017