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Managing a Switch Stack
If you move the master unit of stack to a different place in the network, make
sure you power down the whole stack before you redeploy the master unit so
that the stack members do not continue to use the MAC address of the
redeployed switch.
NSF Network Design Considerations
You can design your network to take maximum advantage of NSF. For
example, by distributing a LAG's member ports across multiple units, the
stack can quickly switch traffic from a port on a failed unit to a port on a
surviving unit. When a unit fails, the forwarding plane of surviving units
removes LAG members on the failed unit so that it only forwards traffic onto
LAG members that remain up. If a LAG is left with no active members, the
LAG goes down. To prevent a LAG from going down, configure LAGs with
members on multiple units within the stack, when possible. If a stack unit
fails, the system can continue to forward on the remaining members of the
stack.
If your switch stack performs VLAN routing, another way to take advantage of
NSF is to configure multiple "best paths" to the same destination on different
stack members. If a unit fails, the forwarding plane removes Equal Cost
Multipath (ECMP) next hops on the failed unit from all unicast forwarding
table entries. If the cleanup leaves a route without any next hops, the route is
deleted. The forwarding plane only selects ECMP next hops on surviving
units. For this reason, try to distribute links providing ECMP paths across
multiple stack units.
Why is Stacking Needed?
Stacking increases port count without requiring additional configuration. If
you have multiple PowerConnect switches, stacking them helps make
management of the switches easier because you configure the stack as a single
unit and do not need to configure individual switches.
Summary of Contents for PowerConnect 7024
Page 134: ...134 Setting Basic Network Information ...
Page 290: ...290 Managing General System Settings Figure 11 14 SNTP Servers Table ...
Page 348: ...348 Configuring SNMP ...
Page 430: ...430 Monitoring Switch Traffic ...
Page 444: ...444 Configuring iSCSI Optimization ...
Page 538: ...538 Configuring 802 1X and Port Based Security ...
Page 594: ...594 Configuring VLANs Figure 21 16 GVRP Port Parameters Table ...
Page 600: ...600 Configuring VLANs Figure 21 23 Double VLAN Port Parameter Table ...
Page 658: ...658 Configuring the Spanning Tree Protocol ...
Page 693: ...Configuring Port Based Traffic Control 693 Figure 24 3 Storm Control 5 Click Apply ...
Page 780: ...780 Configuring Connectivity Fault Management ...
Page 804: ...804 Snooping and Inspecting Traffic Figure 27 17 DAI Interface Configuration Summary ...
Page 818: ...818 Snooping and Inspecting Traffic ...
Page 836: ...836 Configuring Link Aggregation ...
Page 882: ...882 Configuring DHCP Server Settings ...
Page 916: ...916 Configuring L2 and L3 Relay Features Figure 33 3 DHCP Relay Interface Summary ...
Page 924: ...924 Configuring L2 and L3 Relay Features Figure 33 12 IP Helper Statistics ...
Page 930: ...930 Configuring L2 and L3 Relay Features ...
Page 1004: ...1004 Configuring OSPF and OSPFv3 ...
Page 1044: ...1044 Configuring VRRP ...
Page 1057: ...Configuring IPv6 Routing 1057 Figure 37 9 IPv6 Route Preferences ...
Page 1064: ...1064 Configuring IPv6 Routing ...
Page 1084: ...1084 Configuring DHCPv6 Server and Relay Settings ...
Page 1091: ...Configuring Differentiated Services 1091 Figure 39 5 DiffServ Class Criteria ...
Page 1114: ...1114 Configuring Differentiated Services ...
Page 1130: ...1130 Configuring Class of Service ...
Page 1136: ...1136 Configuring Auto VoIP ...
Page 1216: ...1216 Managing IPv4 and IPv6 Multicast ...