Do CE series switches support pinging broadcast addresses

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RFC 1122 does not specify whether broadcast addresses should be successfully pinged, but it provides two opposing ideas as additional discussions. Some people consider that broadcast addresses should be successfully pinged as it is a good method for locating and diagnosing faults on network nodes. Some people disagree with them because networks may be attacked if broadcast addresses can be successfully pinged.

When the ping command is executed on a device, the device sends an ICMP packet to check network connectivity. You can run commands on a Huawei device to configure the device to respond or not to respond to an ICMP packet with a broadcast destination address, depending on your network requirements.

- Run the icmp broadcast-address echo disable command to disable a device from responding to an ICMP packet with a broadcast destination address.

- Run the undo icmp broadcast-address echo disable command to enable a device to respond to an ICMP packet with a broadcast destination address.
By default, a device responds to an ICMP packet with a broadcast destination address.

Other related questions:
Can an S series switch respond to Request packets with broadcast destination addresses
An S series switch can respond to ping requests with broadcast destination addresses. The icmp broadcast-address echo enable command enables a switch to respond to ICMP Echo Request packets with broadcast destination addresses. The undo icmp broadcast-address echo enable command disables a switch from responding to ICMP Echo Request packets with broadcast destination addresses. By default, the function of responding to ICMP Echo Request packets with broadcast destination addresses is enabled.

Possible causes for a failure to ping an IPv6 address
In V100R002 and later versions, the IPv6 address of a device fails to be pinged due to the following possible causes: l. The physical state or protocol state of the interface is Down. You can run the display ipv6 interface interface-type interface-number command in any view to check the physical state and protocol state of an interface. 2. The switch fails to learn ND entries of the peer device. You can run the display ipv6 neighbors command in any view to check information about ND entries. 3. The link transmission delay is too long. The source device does not receive any Response packet from the destination device within the waiting time, and the ping operation fails. You can run the ping ipv6 -t timeout destination-ipv6-address command in any view to set “-t&rdquo to increase the timeout interval for waiting for Response packets.

How to ping the IP address of a VPN instance from a CE series switch
When performing a ping operation, specify -vpn-instance vpn-instance-name.
# Ping the IPv4 address of a VPN instance.
ping -vpn-instance vpna 10.1.1.2 # Ping the IPv6 address of a VPN instance.
ping ipv6 vpn-instance vpna FC00::1

How many MAC addresses do CE series switches support
CE12800 series switches support a maximum of 256 MAC addresses, and CE7800&CE6800&CE5800 series switches support a maximum of 16 MAC addresses.

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