Chinese
English
Problem Description
The link aggregation function is activated between two switches in a bureau. one of the ports takes the private line service configured by OSN1500 's EGS4 and EGS2, and the other port is directly connected using optical fiber. the service is normal when the switches are activated for manual aggregation (LACP protocol is not enabled), but the service does not work when they are configured for static aggregation (LACP protocol is activated). the EGS4 board and the EGS2 board have the external port attribute Hybrid . The external port attribute is Hybrid. the EGS4-side switch can receive LACP packets and the EGS2-side switch cannot receive LACP packets.
Alarm InformationTransmission No Abnormal Alarm
Processing1. Since the service is normal when using manual aggregation, you can be sure that there is no problem with the transmission channel.
2. Compared with manual aggregation, the difference between static aggregation and manual aggregation is that the LACP protocol is used. Therefore, it is suspected that when static aggregation is used, the reason why the service does not work is that the LACP protocol message is not transmitted to the opposite end of the device.
3, LACP protocol is not with VLAN tags, the port attribute set to Hybrid should not be a problem, suspected that egs4 single-board incoming ports are not LACP message transmission.
4. After confirming that the egs4 board supports the LACP protocol, when the external port receives LACP messages, they will be sent to the CPU for processing and will not pass through the LACP messages. In this case, you need to set the port's "ingress detection" function to "disable "
5. In this case, you need to set the "Ingress Detection" function of the port to " Disable" .
5 After you set the "Ingress Detection" function of the port, the static link aggregation service of the switch opens normally.
2. Compared with manual aggregation, the difference between static aggregation and manual aggregation is that the LACP protocol is used. Therefore, it is suspected that when static aggregation is used, the reason why the service does not work is that the LACP protocol message is not transmitted to the opposite end of the device.
3, LACP protocol is not with VLAN tags, the port attribute set to Hybrid should not be a problem, suspected that egs4 single-board incoming ports are not LACP message transmission.
4. After confirming that the egs4 board supports the LACP protocol, when the external port receives LACP messages, they will be sent to the CPU for processing and will not pass through the LACP messages. In this case, you need to set the port's "ingress detection" function to "disable "
5. In this case, you need to set the "Ingress Detection" function of the port to " Disable" .
5 After you set the "Ingress Detection" function of the port, the static link aggregation service of the switch opens normally.
Root cause1. EGS4 board supports LACP protocol, when the external port receives LACP message, it will send it to CPU for processing and will not pass through LACP message, if you need to pass through LACP message, you need to set the "ingress detection" function of the port to "disable ". If you need to pass through LACP messages, you need to set the port "ingress detection" function to "disable".
EGS2 single-board ports do not support LACP protocol and treat LACP messages as ordinary Ethernet messages, so LACP messages can be detected in one direction.
EGS2 single-board ports do not support LACP protocol and treat LACP messages as ordinary Ethernet messages, so LACP messages can be detected in one direction.
Recommendations and SummaryAt the same time, we know that SSN5EFS0 also has this problem, and we need to pay attention to the "ingress detection" attribute configuration when we need to pass through LACP messages
END
Selling the OSN1500B SSN1EGS4_Product Quotation_Sales Manufacturer_Product Characteristics_Product Description_Huawei SDH Transmission Equipment Sales
Supply OSN1500B SSN1EGS4_Troubleshooting_Installation and Tune-up_Technical Specifications_Technical Parameters_Huawei SDH Transmission Equipment Sales
