Network Stack Runs Out Of Heap; Nic Numbering Unexpected On Vmware Systems; Ping To Remote Host Is Failing - Dell Brocade Adapters Troubleshooting Manual

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Network interface problems (CNA or NIC)
2. Possible Cause: The IP address is not configured in the ifcfg-ethX script.

Network stack runs out of heap

The network stack on VMware systems is running out of heap space.
Possible Cause: Enabling NetQueue and using jumbo frames has caused the network stack to run
out of heap with default values set for netPktHeapMaxSize and netPktHeapMinSize. Leaving
default values can result in unpredictable behavior.
Action: Perform the following steps.
1. Log in to the VI Client.
2. Click the Configuration tab for the ESX Server host.
3. Click Advanced Settings.
4. Click VMkernel.
5. Find the corresponding value field for VMkernel.Boot.netPktHeapMaxSize, and enter 128.
6. Find the corresponding value field for VMkernel.Boot.netPktHeapMinSize, and enter 32.
7.
8. Reboot the system.

NIC numbering unexpected on VMware systems

After installing adapter drivers on VMware systems, NIC numbering is not what is normally
expected. For example, instead of vmnic32 or vmnic33, the number is vmnic2 and vmnic3.
Possible Cause: Adapter hardware was installed before drivers.
Action: When installing a CNAs or Fabric Adapters with ports configured in CNA or NIC mode on a
VMware systems, it is advisable to install the driver before the adapters so that the NICs will be
properly enumerated in the system. To resolve the problem, you must perform the following steps.
1. Uninstall the drivers.
2. Remove the adapter.
3. Reboot your system without the adapter.
4. Install the drivers.
5. Install the card.
6. Reboot the host system.

Ping to remote host is failing

Pings generated between servers are failing or there is no response from ping.
1. Possible Cause: Ethernet interface on either server is in the following states:
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Action: Manually configure IP address in ifcfg-ethX script.
Click OK to save the changes.
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Administratively down. Running the Linux or VMware ifconfig command shows that the UP
flag is not set.
Brocade Adapters Troubleshooting Guide
53-1002145-01