Lenovo ThinkSystem NE2552E, Инструкция по применению

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© Copyright Lenovo 2018 Chapter 32: Virtual Router Redundancy Protocol
453
High Availability Configurations
NE2552Es offer flexibility in implementing redundant configurations. This section
discusses the more useful and easily deployed configurations:
 “Active ‐ Active Configuration” on page 453
 “Hot ‐ Standby Configuration” on page 457
Active-Active Configuration
Figure 57 shows an example configuration where two NE2552Es are used as VRRP
routers in an active ‐ active configuration. In this configuration, both switches
respond to packets.
Figure 57.
Active ‐ Active High ‐ Availability Configuration
Although this example shows only two switches, there is no limit on the number of
switches used in a redundant configuration. It is possible to implement an
active ‐ active configuration across all the VRRP ‐ capable switches in a LAN.
Each VRRP ‐ capable switch in an active ‐ active configuration is autonomous.
Switches in a virtual router need not be identically configured.
In the scenario illustrated in Figure 57 , traffic destined for IPv4 address 10.0.1.1 is
forwarded through the Layer 2 switch at the top of the drawing, and ingresses
NE2552E 1 on port EXT1. Return traffic uses default gateway 1 (192.168.1.1).
If the link between NE2552E 1 and the Layer 2 switch fails, NE2552E 2 becomes the
Master because it has a higher priority. Traffic is forwarded to NE2552E 2, which
forwards it to NE2552E 1 through port EXT4. Return traffic uses default gateway 2
(192.168.2.1) and is forwarded through the Layer 2 switch at the bottom of the
drawing.
To implement the active ‐ active example, perform the following switch
configuration.
Internet
Enterprise
Routing Switch
VIR 1: 192.168.1.200 (Master)
VIR 2: 192.168.2.200 (Backup)
VIR 1: 192.168.1.200 (Backup)
VIR 2: 192.168.2.200 (Master)
NIC 1: 10.0.1.1/24
NIC 2: 10.0.2.1/24
NIC 1: 10.0.1.2/24
NIC 2: 10.0.2.2/24
NIC 1: 10.0.1.3/24
NIC 2: 10.0.2.3/24
NIC 1: 10.0.1.4/24
NIC 2: 10.0.2.4/24
L2 Switch
L2 Switch
1
2
4
4
1
2
Switch 1
Switch 2
Server 1
Server 2
Server 3
Server 4