Which two statements about connecting spines to the Inter-Site-Network are true? (Choose two)

Which two statements about connecting spines to the Inter-Site-Network are true? (Choose two)
A . All spines in a site must be EX or later HW
B . Only spines connecting to the ISN must be EX or later HW
C . Sites must have two or more spines connected to the ISN
D . Spine to ISN links can be configured with OSPF or static routes
E . Spine-facing interfaces on the ISN must be configured using subinterface VLAN 4

View Answer

Answer: B E

Explanation:

Source: https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-739609.html

Text from Source: (For Vlan4)

The spine interfaces are connected to the ISN devices through point-to-point routed interfaces.

However, traffic originating from the spine interfaces is always tagged with an 802.1q VLAN 4 value, which implies the need to define and support Layer 3 subinterfaces on both the spines and the directly connected IPN devices. It is hence critical to select IPN routers that allow the defining of multiple subinterfaces on the same device using the same VLAN tag 4 and still functioning as separate point-to-point L3 links.

(For EH or Later HW)

The role of BGP Speakers can only be enabled for Multi-Site-capable spines (that is, second-generation hardware models CEX or newer). The implicit forwarder roles can instead be assigned to all the spines, also first-generation ones.