H3C S5820X Series Irf Command Reference

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H3C S5820X Series Irf Command Reference Manual pdf 30 page image

22Usage guidelinesMAD action is not configurable for IRF physical ports.When MAD detects that an IRF fabric has split into two or more identical active IRF fabrics, only the IRFfabric whose master has the lowest member ID among all the masters can still forward data traffic. MADchanges its status to Recovery on all the other IRF fabrics and shuts down all their physical ports exceptthe IRF physical ports and those manually configured to not shut down.If a port must be kept in up state for special purposes such as Telnet connection, exclude it from theshutdown action. To avoid problems, H3C recommends excluding only the one used for Telnet for themanagement purpose.The ports that have shut down by MAD come up when the member devices reboot to join the recoveredIRF fabric. If auto recovery fails because the current master has failed or any other exception hasoccurred, use the mad restore command to manually recover the member devices and bring up the ports.Examples# Exclude GigabitEthernet 2/0/5 from being shut down when the MAD status transitions to Recovery. system-view[Sysname] mad exclude interface gigabitethernet 2/0/5mad ip addressUse mad ip address to assign a MAD IP address to an IRF member on a VLAN interface for BFD MAD.Use undo mad ip address to delete a MAD IP address.Syntaxmad ip address ip-address { mask | mask-length } member member-idundo mad ip address ip-address { mask | mask-length } member member-idDefaultNo MAD IP address is configured on any VLAN interface.ViewsVLAN interface viewDefault command level3: Manage levelParametersip-address: Specifies an IP address in dotted decimal notation. This IP address is bound to an IRF memberfor BFD detection and is called a "MAD IP address." This MAD IP address must not be on the samesubnet as any IP address configured on any member device.mask: Specifies a subnet mask in dotted decimal notation.mask-length: Specifies a subnet mask in length, in the range of 0 to 32.member member-id: Specifies an IRF member ID.Usage guidelinesTo use BFD MAD, you must configure a MAD IP address on a BFD MAD enabled VLAN interface for eachIRF member, and make sure all the MAD IP addresses are on the same subnet.