Why does an ABR advertise continuous network segment addresses of an area as a summary address

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Perform the following steps to solve this problem:

1. Run the display current configuration command to check whether the network segment addresses of the area are continuous.
2. If the network segment addresses are discontinuous, divide them into several groups of continuous network segment addresses.
3. Run the abr-summary command to summarize each group of continuous networks into a single network on the area border router (ABR).
4. In area view, run the filter export command and ensure that the link-state advertisements (LSAs) summarized by the ABR are not filtered out.

Other related questions:
Why does not an S series switch functioning as an ABR summarize addresses while advertising the routes
Perform the following operations on the S series switch functioning as the ABR to solve the problem. Run the display current configuration command to check whether all network segments in the area are consecutive. If not, divide the network segments into several groups of consecutive network segments. Run the abr-summary command on the ABR to summarize each group of consecutive network segments into one network segment. Check the filter export command in the area view and ensure that the LSA for ABR route summarization is not filtered out.

Whether the firewall supports the VRRP group virtual IP address and interface address that are on different network segments
Can actual interface IP addresses reside on the same network segment as virtual IP addresses in hot standby? 1. You must assign IP addresses to a physical interface before you set the virtual IP address of the VRRP group on the interface. 2. When you configure VRRP groups, ensure that the virtual IP addresses is not the IP address of any physical interface. 3. Invalid address, such as broadcast address, multicast address, or loopback address, cannot be used as the VRRP virtual IP address. 4. If the virtual IP address and the IP address of the physical interface reside on different subnets, you need to specify the subnet mask of the virtual IP address. 5. The VRID of the VRRP group cannot be the same as that configured on any other device in the same VLAN. 6. The VRIDs and virtual IP addresses of VRRP groups configured for the same interfaces on the active and standby USGs shall be the same. Configuration on the USG6000 [USG6600-1]int vlani2 [USG6600-1-Vlanif2]ip add 172.16.1.1 24 [USG6600-1-Vlanif2]vrrp vrid 1 virtual-ip 10.1.1.1 24 active [USG6600-1-Vlanif2]dis thi interface Vlanif2 ip address 172.16.1.1 255.255.255.0 vrrp vrid 1 virtual-ip 10.1.1.1 255.255.255.0 active Configuration on the USG2000&5000 [USG5500]int vlanif10 [USG5500-Vlanif10]ip add 172.16.1.1 24 [USG5500-Vlanif10]vrrp vrid 1 virtual-ip 10.10.1.1 24 master [USG5500-Vlanif10]dis this interface Vlanif10 alias vlanif 10 ip address 172.16.1.1 255.255.255.0 vrrp vrid 1 virtual-ip 10.10.1.1 255.255.255.0 master #

Why is a configuration error message prompted when an S series or E series switches use the network command in RIP to advertise network segment routes
Q: Why is a configuration error message prompted when the network command in RIP is used to advertise network segment routes? A: RIP is based on natural network segments. Though RIP version 2 supports other subnet masks, natural network segments must be used for configuration. For example, if the IP address of VLANIF100 is set to 1.1.1.1/24, the network 1.0.0.0 command must be used for configuration.

How does the USG allow OSPF to advertise the virtual address of VRRP?
In the area of ospf, use the network command to publish the virtual address.

Whether the USG2000&5000 series supports adding a network segment to a blacklist entry
You can add only one IP address at a time in the configuration of the blacklist entry on the USG2000&5000 series. To add multiple IP addresses, add them in multiple times.

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