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7.6.1.0 - Force10 Networks

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Figure 96 Server Clustering: Multiple ARP Replies<br />

Microsoft Server Cluster:<br />

IP Cluster<br />

MAC Cluster<br />

Server1:<br />

MACS1<br />

IP S1<br />

Server2:<br />

IP<br />

S2<br />

MAC<br />

S2<br />

IP<br />

Server3: S3<br />

MAC<br />

S3<br />

IP<br />

Server3: S4<br />

MAC<br />

S4<br />

Source MAC: MAC<br />

S1<br />

Destination MAC: MAC<br />

Client<br />

Type: 0x0806<br />

Last ARP Reply<br />

168 Layer 2<br />

VLAN 1<br />

Source IP: IP<br />

S1<br />

Source MAC: MAC<br />

Cluster<br />

Ethernet Frame Header ARP Reply<br />

Figure 97 Server Clustering: Failover and Balancing Not Preserved<br />

Microsoft Server Cluster:<br />

IP Cluster<br />

MAC Cluster<br />

Server1:<br />

MACS1<br />

IP S1<br />

Server2:<br />

IP<br />

S2<br />

MAC<br />

S2<br />

IP<br />

Server3: S3<br />

MAC<br />

S3<br />

IP<br />

Server3: S4<br />

MAC<br />

S4<br />

VLAN 1<br />

Data<br />

Pad CRC<br />

Configuring the Switch for Microsoft Server Clustering<br />

Client<br />

fnC0027mp<br />

Client<br />

fnC0028mp<br />

To preserve failover and balancing, the <strong>Force10</strong> switch must learn the cluster’s virtual MAC address, and<br />

it must forward traffic destined for the server cluster out all member ports in the VLAN connected to the<br />

cluster. To ensure that this happens, you must configure the command vlan-flooding on the <strong>Force10</strong><br />

switch at the time that that the Microsoft cluster is configured (Figure 98).

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