August 2018
Beginner
462 pages
12h 36m
English
Content preview from Learning OpenStack Networking - Third Edition
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Potential issues when using overlay networks
One thing to be aware of when using overlay networking technologies is that the additional headers added to the encapsulated packets may cause them to exceed the maximum transmission unit (MTU) of the switchport or interface. The MTU is the largest size of packet or frame that can be sent over the network. Encapsulating a packet with VXLAN headers may cause the packet size to exceed the default maximum 1500-byte MTU. Connection issues caused by exceeding the MTU manifest themselves in strange ways, including partial failures in connecting to instances over SSH or a failure to transfer large payloads between instances, and more. To avoid this, consider lowering the MTU of interfaces within virtual ...
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