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Posts Tagged ‘NLB’

VMware: Sample Configuration – Network Load Balancing (NLB) Multicast Mode Configuration (1006558)

March 2nd, 2009 1 comment
Setting up NLB Multicast Mode
  • Multicast mode does not have the problem that unicast operation does since the servers can communicate with each other via the original addresses of their NLB network cards.
  • Each server’s NLB network card operating in multicast mode has two MAC addresses (the original one and the virtual one for the cluster) causes some problems on its own. Most routers reject the ARP replies sent by hosts in the cluster, since the router sees the response to the ARP request that contains a unicast IP address with a multicast MAC address. The router considers this to be invalid and rejects the update to the ARP table. In this case you’ll need to manually Configure Static ARP Resolution at Switch or router for each port connecting to ESX’s NICS. See also 1006525 (Network Load Balancing (NLB) Multicast mode over routed subnet – Cisco Switch Static ARP Config)

For additional information, see Sample Configuration – Network Load Balancing (NLB) Multicast mode over routed subnet – Cisco Switch Static ARP Configuration (1006525).

Check out the complete knowledge base article after the jump

Source: 1006558
Categories: VMware Tags: , , ,

VMware: Sample Configuration – Network Load Balancing (NLB) Multicast mode over routed subnet – Cisco Switch Static ARP Configuration (1006525)

March 2nd, 2009 2 comments

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To configure the switch:

  1. Telnet in to Cisco Switch Console and log in.
  2. Run the following command to enter Configuration mode:
    config t
  3. STATIC ARP RESOLUTION Cisco Global command mode
    For example:
    arp [ip] [cluster multicast mac] ARPA
    arp 192.168.1.100 03bf.c0a8.0164 ARPA
  4. STATIC MAC RESOLUTION Cisco Global command mode
    For example:
    mac-address-table static [cluster multicast mac] [vlan id] [interface]
    mac-address-table static 03bf.c0a8.0164 vlan 1 interface GigabitEthernet1/1 GigabitEthernet1/2
    GigabitEthernet1/15 GigabitEthernet1/16

For related information, see Sample Configuration – Network Load Balancing (NLB) Multicast Mode Configuration (1006558).

Check out the complete knowledge base article after the jump

Source: 1006525
Categories: VMware Tags: , , , ,