Terminologies involved, etc:
MCP - miscabling protocol
isis
ecmp
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APIC - is the policy controller.
- does not control the data plane in the fabric.
- normally 3 or more apics.
- they are always active/active.
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|9500| = Spines
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|9300| = Leaves
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|C220 M4| = apic / aci - running a variant of Cent OS
*Always dual home from APIC to Leaves.
* if you configured one apic, all apic will be "SHARDED", meaning to say replicated.
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* Fabric discovery is done via LLDP
- it has this ACI specific TLV's (OUI)
- Loopback, VTEP IP address, are handed out via dhcp from apic in infra -vrf/vlan
*Apic mgmt connects to infra vrf / vlan (say VLAN 4)
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APIC is responsible for
a) Fabric discovery and addressing (VLAN 4 will be used to achieve this to be sent out to different fabric members)
b) Image management
c) Topology and cabling validation
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*Connect the KVM to the physical APIC. Press F8 . Go to CIMC config.
* Default VTEP addressing 10.0.0.0 /16
*Within the fabric, lldp is explicitly enabled.
IN SUMMARY of ACI Bootstrap and Fabric Discovery:
1) Leaf SW discovers APIC via LLDP.
2) Request TEP address and boot file from APIC.
3) Spine will discover leaf.
4) Request TEP address and boot file from APIC.
5) Fabric now self-assembles!
6) If multiple apics found on the AV (appliance vendor), they will form CLUSTER.
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