How to read route table information in a vro

Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.123.254 192.168.123.88 1 0.0.0.0 0.0.0.0 192.168.123.254 192.168.123.68 1 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1 192.168.123.0 255.255.255.0 192.168.123.68 192.168.123.68 1 192.168.123.0 255.255.255.0 192.168.123.88 192.168.123.88 1 192.168.123.68 255.255.255.255 127.0.0.1 127.0.0.1 1 192.168.123.88 255.255.255.255 127.0.0.1 127.0.0.1 1 192.168.123.255 255.255.255.255 192.168.123.68 192.168.123.68 1 192.168.123.255 255.255.255.255 192.168.123.88 192.168.123.88 1 224.0.0.0 224.0.0.0 192.168.123.68 192.168.123.68 1 224.0.0.0 224.0.0.0 192.168.123.88 192.168.123.88 1 255.255.255.255 255.255.255.255 192.168.123.68 192.168.123.68 1 Default Gateway: 192.168.123.254

Current route:

Destination CIDR Block mask Subnet mask

The egress ip address of the router to which the interface reaches the destination.

The ip address of the next hop router entry of the gateway. The router defines a link to the next router through the interface and gateway. Generally, the interface and gateway are in the same network segment.

The number of metric hops. The quality of the route record. Generally, if there are multiple route records that reach the same destination, the router uses the one with a small metric value.

The first 0.0.0.0 0.0.0.0 192.168.123.254 192.168.123.88 1

Default route: that is, when the destination CIDR block of a data packet is not in your route record, where should your router send the data packet! The gateway of the default route is determined by the default gateway on your connection.

This route record means that when the destination CIDR block of a packet received is not in my route record, I will send the packet to the address 192.168.123.254 through the interface 192.168.123.88, this address is an interface of the next vro, so that this packet can be delivered to the next vro for processing, and it has nothing to do with me. Line quality 1 of this route record

Article 2 0.0.0.0 0.0.0.0 192.168.123.254 192.168.123.68 1

Default route: This route record indicates that when the destination network segment of a packet received is not in my route record, I will send the packet to the address 192.168.123.254 through the interface 192.168.123.68, this address is an interface of the next vro, so that this packet can be delivered to the next vro for processing, and it has nothing to do with me. Line quality 1 of this route record

Article 3 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1

Local Loop: all the addresses in the network segment 127.0.0.0 point to their own machines. If such data is received, the route quality 1

Article 4 192.168.123.0 255.255.255.0 192.168.123.68 192.168.123.68 1

Route record of the direct connection CIDR Block: What to do when the router receives a packet sent to the direct connection CIDR Block? In this case, the interface and gateway of the route record are the same.

When I receive a packet whose destination CIDR block is 192.168.123.0, I will send the packet directly through the interface 192.168.123.68 because the port is directly connected to the CIDR Block 192.168.123.0, line quality 1 of this route record

Article 5 192.168.123.0 255.255.255.0 192.168.123.88 192.168.123.88 1

Route record of the direct network segment

When I receive a packet whose destination CIDR block is 192.168.123.0, I will send the packet directly through the interface 192.168.123.88 because the port is directly connected to the CIDR Block 192.168.123.0, line quality 1 of this route record

Article 6 192.168.123.68 255.255.255.255 127.0.0.1 127.0.0.1 1

Local Host Routing: How does a router handle a packet sent to itself?

When I receive a packet whose destination CIDR block is 192.168.123.68, I will accept the packet because the packet is sent to my own, the route record's line quality 1

Article 7 192.168.123.88 255.255.255.255 127.0.0.1 127.0.0.1 1

Local Host Routing: How does a router handle a packet sent to itself?

When I receive a packet whose destination CIDR block is 192.168.123.88, I will accept the packet because the packet is sent to my own, the route record's line quality 1

Article 8 192.168.123.255 255.255.255.255 192.168.123.68 192.168.123.68 1

Local broadcast route: What to do when the router receives the local broadcast sent to the direct network segment?

When I receive a broadcast packet whose destination CIDR block is 192.168.123.255, I will send the data from the 192.168.123.68 interface as a broadcast. The route record's line quality is 1.

Article 9 192.168.123.255 255.255.255.255 192.168.123.88 192.168.123.88 1

Local broadcast route: What to do when the router receives the local broadcast sent to the direct network segment?

When I receive a broadcast packet whose destination CIDR block is 192.168.123.255, I will send the data from the 192.168.123.88 interface as a broadcast. The route record's line quality is 1.

Article 10 224.0.0.0 224.0.0.0 192.168.123.68 192.168.123.68 1

Multicast Route: What to do when a vro receives a multicast packet

When I receive multicast data packets, I will send the data from the 192.168.123.68 interface in multicast mode. The route record's line quality is 1.

Article 21 224.0.0.0 224.0.0.0 192.168.123.88 192.168.123.88 1

Multicast Route: What to do when a vro receives a multicast packet

When I receive multicast data packets, I will send the data from the 192.168.123.88 interface in multicast mode. The route record's line quality is 1.

Article 21 255.255.255.255.255 255.255.255.255 192.168.123.68 192.168.123.68 1

Broadcast route: What should I do when the router receives an absolute broadcast?

When I receive an absolute broadcast packet, this packet is discarded.

1. How to update a route table
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