MTU-1.3: Added new testcases

[hattikals]

Added new testcases according to the requirement mentioned in MTU-1.3.2

[OpenConfigBot]

Pull Request Functional Test Report for #3539 / adf1cc2

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		MTU-1.3: Large IP Packet Transmission
Cisco 8000E		MTU-1.3: Large IP Packet Transmission
Cisco XRd		MTU-1.3: Large IP Packet Transmission
Juniper ncPTX		MTU-1.3: Large IP Packet Transmission
Nokia SR Linux		MTU-1.3: Large IP Packet Transmission
Openconfig Lemming		MTU-1.3: Large IP Packet Transmission

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		MTU-1.3: Large IP Packet Transmission
Cisco 8808		MTU-1.3: Large IP Packet Transmission
Juniper PTX10008		MTU-1.3: Large IP Packet Transmission
Nokia 7250 IXR-10e		MTU-1.3: Large IP Packet Transmission

Help

[coveralls]

Pull Request Test Coverage Report for Build 11492920714

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 55.268%

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Totals
Change from base Build 11492895831:	0.0%
Covered Lines:	1983
Relevant Lines:	3588

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💛 - Coveralls