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Fixed

LIN10-4746 : TIPC 2.0 communication failed after MTU was set to 9700

Created: Sep 17, 2018    Updated: Dec 3, 2018
Resolved Date: Oct 15, 2018
Previous ID: LIN8-9835
Found In Version: 10.17.41.11
Fix Version: 10.17.41.12
Severity: Severe
Applicable for: Wind River Linux LTS 17
Component/s: Kernel

Description

After set MTU to 9700, can not sync name table between two node, part of them will lost, and show the following error:
/*********************************/
no route to host
/*********************************/

If keep the MTU as default value, will not trigger this issue.

Not sure if this is TIPC limitation or PMTU defect

Steps to Reproduce

1, set one of node's MTU to 9700

2, config tipc on two node with tipc-config, such as:
tipc-config -addr=1.1.20552,tipc-config -be=eth:eth2.4901

3, then call tipc related API to try to do communication between two node. 

issue will happen when one node try to send tipc message to another node:
/********************************************************************/
dcal_tipc_sendmsg:829] Send multi msg to 20001f00:40000001 error: No route to host
2016/05/21 17:20:00:884762 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 2000b800:40000001 error: No route to host
2016/05/21 17:20:01:760497 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20002000:40000001 error: No route to host
2016/05/21 17:20:01:822377 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20002000:40000001 error: No route to host
2016/05/21 17:20:01:822494 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20001f00:40000001 error: No route to host
2016/05/21 17:20:01:822579 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 2000b800:40000001 error: No route to host
2016/05/21 17:20:01:833981 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20001f00:40000001 error: No route to host
2016/05/21 17:20:01:884773 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 2000b800:40000001 error: No route to host
2016/05/21 17:20:02:759920 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20002000:40000001 error: No route to host
2016/05/21 17:20:02:822386 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20002000:40000001 error: No route to host
2016/05/21 17:20:02:822506 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20001f00:40000001 error: No route to host
2016/05/21 17:20:02:822667 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 2000b800:40000001 error: No route to host
2016/05/21 17:20:02:833970 trace/3: [dcal_tipc_sendmsg:829] Send multi msg to 20001f00:40000001 error: No route to host
/********************************************************************/

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