ce-ping evpn

Function

The ce-ping evpn source-ip command detects connectivity between a CE and a PE in an Ethernet VPN (EVPN).

Format

ce-ping ip-address evpn evpn-name source-ip source-ip-address [ mac mac-address | count count | interval interval ] ^*

Parameters

Parameter	Description	Value
ip-address	Specifies a destination IP address for CE ping.	The value is in dotted decimal notation.
evpn evpn-name	Specifies the name of an EVPN for CE ping.	The name is a string of 1 to 31 case-sensitive characters, spaces not supported.
source-ip source-ip-address	Specifies a source IP address for CE ping.	The value is in dotted decimal notation.
mac mac-address	Specifies a source MAC address for CE ping.	The value ranges from E024-7FA4-D2CB to E024-7FA4-D2DA. Note that the following conditions must be met: Each device can be assigned only one source MAC address at one time and the source MAC address must be unique. The source MAC address for CE ping must not be used by interfaces on the device. By default, the system automatically chooses one from the 16 dedicated MAC addresses for CE ping as the source MAC address and encapsulates it in the packet. You are advised to manually assign a source MAC address for each device because different devices may choose the same MAC address. If a user runs the mac-address blackhole command to set one of the dedicated MAC addresses as a blackhole MAC address, the MAC address cannot be used as the source MAC address for CE ping any longer.
count count	Specifies the number of CE ping messages to be sent.	The value is an integer ranging from 1 to 255. The default value is 3.
interval interval	Specifies the interval for sending CE ping messages.	The value is an integer ranging from 1 to 10, in seconds. The default value is 3 seconds.

Views

All views

Default Level

0: Visit level

Task Name and Operations

Task Name	Operations
sla	execute

Usage Guidelines

Usage Scenario

In an EVPN scenario, to detect reachability to a CE in a specified EVPN broadcast domain, run the ce-ping evpn source-ip command on a PE in the MPLS network. The PE sends an ARP request to the specified EVPN broadcast domain for the MAC address of the destination CE. If the PE can receive an ARP response from the CE, the PE determines that the CE is reachable.

Precautions

When you run the command to specify the source IP address, note the following:

The specified source IP address must be on the same network segment as the IP address of the CE. Otherwise, when the CE receives CE ping messages, it regards them invalid and discards them.
The specified source IP address must be unused in the EVPN broadcast domain. Otherwise, CE ping messages will not be forwarded properly, which causes users who use the source IP address unable to access the network. If the specified source IP address happens to be the IP address of the gateway, all packets within the EVPN cannot be properly forwarded, making all hosts within the EVPN unable to access the network.
To avoid the preceding problems, the system will inform you that you must use an unused IP address as the source IP address after running the ce-ping evpn command and instruct you to enter Y for confirmation.

Example

# Run the ce-ping bd command to ping the destination address 10.1.1.1/24 in EVPN huawei123. Specify the source address to 10.1.1.12/24 and send five ARP requests at an interval of 2 seconds.

<HUAWEI> ce-ping 10.1.1.1 evpn huawei123 source-ip 10.1.1.12 mac 00e0-fc12-5678 interval 2 count 5
Info: If the designated source IP address is in use, it could cause the abnormal data transmission in EVPN network. Are you sure the source-ip is unused in this EVPN? [Y/N]:y
Ce-ping is in process...
10.1.1.1 is used by 00-e0-fc-12-34-56

**Table 1** Description of the **ce-ping evpn** command output
Item	Description
10.1.1.1 is used by 00-e0-fc-12-34-56	10.1.1.1 is reachable, and the corresponding MAC address is 00-e0-fc-12-34-56.