The linkage function between firewall HRP and dynamic routing protocols does not currently support which of the following routing protocols?

Question

Options

• AOSPFV3
• BBGP
• CISIS
• DOSPF

• A
  8% (2)
• B
  4% (1)
• C
  71% (17)
• D
  17% (4)

Explanation

IS-IS (Intermediate System to Intermediate System) is the routing protocol not supported by the HRP (High Reliability Protocol) linkage function on Huawei firewalls. The HRP linkage mechanism is designed to monitor routing protocol states and trigger active/standby switchovers, but IS-IS integration is absent from this feature's scope in current implementations.

Options A (OSPFv3), B (BGP), and D (OSPF) are all distractors because Huawei's HRP linkage explicitly supports these three protocols - OSPF and OSPFv3 cover IPv4 and IPv6 link-state routing respectively, while BGP handles inter-domain path-vector routing, and all three can trigger HRP failover events.

Memory tip: Think "HRP likes the Big Three - OSPF, OSPFv3, BGP - but leaves ISIS out in the cold." IS-IS is often the odd one out in vendor-specific feature support lists, making it a reliable exam trap answer when a routing protocol must be excluded.

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