Network & Infrastructure
A leaf can route to one remote subnet but not another after tenant growth. The chosen asymmetric design may require local bridge context for remote destination subnets that was never provisioned.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : Asymmetric IRB and the cost of remote subnet presence
Network & Infrastructure
An external prefix is visible as an EVPN Type-5 route but is not usable in the tenant VRF. Its overlay resolution model may depend on additional gateway or router information.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : EVPN Type-5 prefix routes and overlay next-hop resolution
Network & Infrastructure
A fabric has several equal-cost uplinks, yet one is congested while others are quiet. Encapsulated traffic may expose insufficient entropy to the underlay's hashing algorithm.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : VXLAN underlay ECMP polarization despite many tenant flows
Network & Infrastructure
Small overlay packets succeed while larger application responses fail between racks. The underlay may not accommodate the tenant packet plus outer encapsulation and link-specific overhead.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : VXLAN encapsulation MTU and selective tenant packet loss
Network & Infrastructure
A dual-homed host receives duplicate traffic or loses connectivity after one uplink changes state. The two leaves may disagree about which Ethernet segment their ports represent.
EVPN, VXLAN & Data Center Fabrics1 นาทีในการอ่าน
อ่านบทความ : EVPN multihoming ESI consistency and duplicate attachments
Network & Infrastructure
Remote broadcast traffic disappears during a multihoming event even though known unicast recovers. Designated-forwarder state can be inconsistent or converge differently from ordinary MAC reachability.
EVPN, VXLAN & Data Center Fabrics1 นาทีในการอ่าน
อ่านบทความ : Designated-forwarder election and BUM loss on a multihomed segment
Network & Infrastructure
A multihomed segment sees repeated broadcast frames after a new external bridge is connected. Traffic may return to the same segment through an unintended overlay or local bridge path.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : EVPN split horizon and duplicate BUM reflection
Network & Infrastructure
A leaf failure leaves thousands of remote MACs pointing at an unusable attachment longer than expected. The multihoming design may not be using the expected segment-level withdrawal behavior.
EVPN, VXLAN & Data Center Fabrics1 นาทีในการอ่าน
อ่านบทความ : EVPN mass withdrawal versus individual MAC convergence
Network & Infrastructure
Two hosts advertise the same tenant IP from different racks, producing intermittent neighbor resolution. MAC reachability can be individually correct while IP ownership is ambiguous.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : Duplicate tenant IP addresses with different EVPN MAC owners
Network & Infrastructure
BGP remains healthy as tenant endpoints grow, but newly learned hosts fail to forward. Hardware MAC, neighbor or next-hop limits can be reached before the control-plane route limit.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : EVPN route scale and hidden neighbor-table exhaustion
Network & Infrastructure
A border leaf imports external routes into a tenant, then accidentally re-exports another tenant's learned prefixes. The resulting connectivity violates the intended shared-services boundary.
EVPN, VXLAN & Data Center Fabrics1 นาทีในการอ่าน
อ่านบทความ : EVPN border-leaf redistribution and unintended tenant transit
Network & Infrastructure
A rolling upgrade creates intermittent failures only when traffic crosses leaves running different software releases. Successful BGP sessions can mask differences in supported EVPN attributes or forwarding behavior.
EVPN, VXLAN & Data Center Fabrics2 นาทีในการอ่าน
อ่านบทความ : Rolling fabric upgrades and EVPN feature compatibility