Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

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Cisco APIC Layer 3 Networking Configuration Guide, Release 6.2(x)

Overload behavior on bootup

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Describes the behavior that prevents a border leaf switch from joining the active border leaf switch list immediately after gaining fabric connectivity.


Overload behavior on bootup is a network protocol mechanism that delays a border leaf switch from becoming part of the active border leaf switch list when it gains connectivity to the fabric for the first time after bootup or after losing connectivity, ensuring the border leaf switch has sufficient time to pull the COOP repo1 information and to bring up its southbound protocol adjacencies by delaying the transmission of PIM/PIM6 hello messages for a non-configured period of time.

1 All IPv4/IPv6 multicast group membership information is stored in the COOP database on the spines. When a border leaf boots up it pulls this information from the spine