Unrecognized routes in a routing table¶
TNSR automatically populates routing tables with necessary entries that may not appear to directly correspond with manually configured addresses. See Common Routes for details.
OSPF Neighbors Stuck in ExStart State¶
When attempting to form an adjacency between two OSPF
(Open Shortest Path First v2 (OSPF)) neighbors, if the neighbor status appears
to be stuck in the
ExStart state, the most likely cause is an MTU mismatch
between the routers.
To solve this problem, adjust the MTU values of the interfaces actively
participating in OSPF on all routers to match. If this is not possible, try
mtu-ignore option on active OSPF interfaces.
Large packets fail to pass over IPsec¶
Encapsulated packets which are larger than the
default-data-size buffer will
be dropped by the dataplane. On older versions of TNSR this may even result in
a dataplane crash. The size of this buffer is
2048 by default, which will
pass packets up to approximately
2000 bytes. Since the default MTU is
1500, this issue is not apparent in many cases. However, when attempting
to pass jumbo frames over IPsec, this becomes a problem. To pass
frames over IPsec, increase the buffer size to
16384 and restart the
tnsr(config)# dataplane buffers default-data-size 16384 tnsr(config)# service dataplane restart