Netgear XCM8806 Chassis User Manual - Page 122
Jumbo Frames, Guidelines for Jumbo Frames, Enabling Jumbo Frames per Port
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NETGEAR 8800 User Manual Under certain conditions, you might opt to turn autopolarity off on one or more ports. The following example turns autopolarity off for ports 5 to 7 on an XCM8806 series switch: configure ports 6:5-6:7 auto-polarity off When autopolarity is disabled on one or more Ethernet ports, you can verify that status using the command: show ports information detail Jumbo Frames Jumbo frames are Ethernet frames that are larger than 1522 bytes, including four bytes used for the cyclic redundancy check (CRC). NETGEAR products support switching and routing of jumbo frames at wire-speed on all ports. The configuration for jumbo frames is saved across reboots of the switch. Jumbo frames are used between endstations that support larger frame sizes for more efficient transfers of bulk data. Both endstations involved in the transfer must be capable of supporting jumbo frames. The switch only performs IP fragmentation, or participates in maximum transmission unit (MTU) negotiation on behalf of devices that support jumbo frames. Guidelines for Jumbo Frames For information on displaying jumbo frame status, see Displaying Port Information on page 148. Enabling Jumbo Frames per Port You can enable jumbo frames per port. When you configure vMANs on NETGEAR 8800 series switches, you can enable or disable jumbo frames for individual ports before configuring the vMANs. Enabling Jumbo Frames Note: Some network interface cards (NICs) have a configured maximum MTU size that does not include the additional 4 bytes of CRC. Ensure that the NIC maximum MTU size is at or below the maximum MTU size configured on the switch. Frames that are larger than the MTU size configured on the switch are dropped at the ingress port. 122 | Chapter 5. Configuring Slots and Ports on a Switch
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