Why two masters exist

2

The possible causes are as follows:

1. Configuration parameters such as the authentication mode and key, VRID, virtual address list, and version on devices in the VRRP group are different.
2. The link where heartbeat packets pass is unstable or disconnected.
3. The interface is blocked by loop prevention protocols such as STP and RRPP.
4. The CPU usage is high.

Other related questions:
Common LSA types defined by OSPF of S series switches
Question: What are the common LSAs used in OSPF of S series switches? Why Type 6 LSAs do not exist? Answer: On S series switches supporting OSPF, OSPF uses the following types of LSAs: Type 1 LSA: router LSA Type 2 LSA: network LSA Type 3 LSA: summary LSA Type 4 LSA: ASBR-summary LSA Type 5 LSA: AS-external-LSA Type 7 LSA: NSSA AS-external-LSA OSPF packets were encoded based on Type-Length-Value (TLV). To enable other OSPF functions, you need to use LSAs of other types. Type 6 LSAs, indicating group-membership-LSAs, are used to identify multicast group members in Multicast Open Shortest Path First (MOSPF). Switches do not support Type 6 LSAs. Type 8 LSAs, indicating external-attributes-LSAs, are used to import BGP routes into OSPF processes for inter-operations and reserve information about BGP routes such as AS-Path. Switches do not support Type 8 LSAs. The Opaque LSA type is defined by RFC 2370 and can use the TLV structure. Applications such as OSPF Traffic Engineering (TE) are implemented by the Opaque LSA. The Type 9 LSA is the Opaque LSA flooding on a link. The Type 10 LSA is the Opaque LSA flooding within an area. The Type 11 LSA is the Opaque LSA flooding within an AS.

How Do I Resolve the Problem That Two OperationCenter Active Nodes Exist
Due to network exception, there may be two active nodes after OperationCenter restarts. Both the active and standby nodes are in the active state. For details,seeHow Do I Resolve the Problem That Two OperationCenter Active Nodes Exist,The applicable version is 3.0.5,3.0.7,3.0.8,3.0.9.

Why VLANIF interface on S series switch has too many ARP entries
If ARP strict learning is not enabled on an S series switch, except S1700, and a VLANIF interface on the switch is in a large broadcast domain, the switch learns ARP packets from any devices and generates ARP entries. The switch may need to maintain a large number of ARP entries. To address this problem, run the arp learning strict command to enable ARP strict learning.

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