Troubleshooting
Problem
Outbound replication traffic from WebSphere DataPower XC10 Appliance is sent on a single interface, instead of being distributed across all available interfaces. This problem occurs when the available interfaces are on the same subnet.
Symptom
You can experience low performance due to high volumes of traffic on an overloaded interface.
Cause
WebSphere DataPower XC10 Appliance uses the lowest indexed interface for outbound replica traffic.
Resolving The Problem
To resolve this problem, complete the following steps:
- Aggregate the interfaces into a single, aggregate interface. After you aggregate the interfaces, the appliance implementation selects the outbound interface based on the lowest associated index.
Using the command-line interface to create, edit, or remove aggregate interfaces is the preferred approach. For each operation, you must log in to the appliance first. After you complete an operation, run the clear-all command and restart your appliance.
- Specify layer 3+4 for the Link Aggregation Control Protocol (LACP) hash policy.
- Interface indexes are updated when interface settings are modified. To force outbound replication traffic over a specific interface, either over an aggregate or individual interface, make artificial changes to the interfaces until the preferred interface has the lowest index.
Note: The management port will also be used for outbound traffic if it is on the same subnetwork as the other interfaces, and it is the lowest indexed interface. - (Optional) Verify that the preferred index is selected.
From the command line for the appliance, run show status netif. Alternatively, run list ethernet-interface, and status ethernet-interface [interface_name] for each listed interface name. For aggregate interfaces, run list aggregate-interface and then status ethernet-interface [interface_name] for each aggregate interface name.
In the results, the index for each interface is displayed. In the following example results, the specified index is highlighted in bold text:
Console> show status netif
Aggregate the interfaces |
Console> create aggregate-interface myAgg Console aggregate-interface:myAgg> member eth3 eth4 Console aggregate-interface:myAgg> ip CWZBR02205I: Entering "ip" mode Console aggregate-interface:myAgg ip> address 10.5.5.5/24 Console aggregate-interface:myAgg ip> exit Console aggregate-interface:myAgg> primary-member eth3 Console aggregate-interface:myAgg> aggregation-policy balance-tlb Console aggregate-interface:myAgg> show aggregate-interface myAgg: name "myAgg" AdminState "Enabled" use-arp "true" mtu "1500" ip use-dhcp "false" address "10.5.5.5/24" use-slaac "false" dad-transmits "1" dad-retransmit-timer "1000" end ip aggregation-policy "balance-tlb" lacp-selection-logic "stable" transmit-hash-policy "layer2" member "eth3" "eth4" primary-member "eth3" |
Edit the aggregate interface | Console aggregate-interface:myAgg> aggregation-policy lacp Console aggregate-interface:myAgg> transmit-hash-policy layer3+4 Console aggregate-interface:myAgg> exit Console> show aggregate-interface myAgg aggregate-interface myAgg: [Up] name "myAgg" AdminState "Enabled" use-arp "true" mtu "1500" ip use-dhcp "false" address "10.5.5.5/24" use-slaac "false" dad-transmits "1" dad-retransmit-timer "1000" end ip aggregation-policy "lacp" lacp-selection-logic "stable" transmit-hash-policy "layer3+4" member "eth3" "eth4" primary-member "eth3" |
Remove the aggregate interface | Console> delete aggregate-interface myAgg Console> list aggregate-interface Console aggregate-interface:myAgg> exit |
OpState:[Down]
generic MTU:1500 carrier:false flags: BROADCAST MULTICAST index:8
ethernet Link:off MAC: 00:1a:64:88:a5:85 autoneg:on duplex:Full
port:TP speed:1000Mbps
statistics collisions:0 multicast:0 rx_bytes:0 rx_compressed:0
rx_crc_errors:0 rx_dropped:0 rx_errors:0 rx_fifo_errors:0
rx_frame_errors:0 rx_length_errors:0 rx_missed_errors:0
rx_over_errors:0 rx_packets:0 tx_aborted_errors:0 tx_bytes:0
tx_carrier_errors:0 tx_compressed:0 tx_dropped:0 tx_errors:0
tx_fifo_errors:0 tx_heartbeat_errors:0 tx_packets:0
tx_window_errors:0
Related Information
[{"Product":{"code":"SSS8GR","label":"WebSphere DataPower XC10 Appliance"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"Not Applicable","Platform":[{"code":"PF009","label":"Firmware"}],"Version":"2.1.0.2;2.1.0.1;2.1","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
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Document Information
Modified date:
15 June 2018
UID
swg21622298