© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr
212121
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
HSRP Redundancy
• HSRP configured between supervisors on
different Catalyst 4500 chassis
• HSRP configured between a Catalyst 4500
and an external router
• No HSRP between two supervisors on the
same chassis since the standby supervisor
is in suspended mode
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© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
Port Channel Redundancy
• Layer 2 EtherChannel
®
bundles
All interfaces in the same VLAN or trunks with trunking mode the same on
both ends
When trunking…allowed ranges of VLANs must be the same
• Layer 3 EtherChannel bundles
Port channel must be created first; then...
Use “no switchport” to create the layer 3 ports in the channel
• Supervisor Engine ports in an EtherChannel
Supervisor II: Both ports can be in the EtherChannel
Single Cisco IOS supervisor in slot 1 or 2: gi1/1–2 or gi2/1–2 active
With Sup II-Plus or IV Dual Supervisors, only gig1/1 AND gig2/1 active; but
gig1/2 and gig2/2 can be placed in an EtherChannel bundle for backup
With Supervisor V, all four uplinks are active
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