Technical data

Brocade MLX Series and NetIron Family Documentation Updates 9
53-1002805-03
IPv6 VRRP-E short path forwarding for MCT
1
IPv6 VRRP-E short path forwarding for MCT
TABLE 3 Supported devices for IPv6 VRRP-E short path forwarding for MCT.
For additional Multi-Chassis Trunking (MCT) information, refer to the latest Brocade MLXe and
NetIron Family Configuration Guide located at
www.brocade.com.
IPv6 VRRP-E short-path forwarding and revertible option
Short-path forwarding enables the short path forwarding on an IPV6 VRRP-E device. It will revert
back to standard behavior (no short-path forwarding) temporarily even if short-path forwarding is
configured.
Configuration considerations
• VRRP-E virtual MAC will be synced and learned on ICL ports on backup routers through the ICL.
• ICL ports must be member ports of VLANs that CCEP ports are members of.
• VRRP or VRRP-E master router will be broadcast hello packets to all VLAN member ports
including ICL ports. Normal VLAN FID will be used for broadcasting.
• VRRP or VRRP-E backup routers will not be flood back hello packets received from ICL ports to
ICL ports, but will be flooded to other non- ICL ports.
• MCT switches must have complete routing information using static routes for L3 forwarding.
• For MCT switches configured with VRRP or VRRP-E, track-port features can be enabled to track
the link status to the core switches so the VRRP or VRRP-E failover can be triggered.
NOTE
Brocade recommends disabling ICMP redirect globally to avoid unintended CPU forwarding of traffic
when VRRP or VRRP-E is configured.
L3 traffic forwarding behaviors
When one MCT switch act as VRRP or VRRP-E master router and the other MCT switch is VRRP or
VRRP-E backup, the following behavior will be seen:
• Packets sent to VRRP-E virtual IPv6 address will be L2 switched to the VRRP-E master router
for forwarding.
• The VRRP-E MAC will be learned by the other MCT switch that acts as backup router.
• Both data traffic and VRRP-E control traffic will need to travel through ICL unless the short-path
forwarding feature is enabled.
Features
supported
Brocade
NetIron
XMR Series
Brocade
MLX Series
Brocade
NetIron CES
2000 Series
BASE
package
Brocade
NetIron CES
2000 Series
ME_PREM
package
Brocade
NetIron CES
2000 Series
L3_PREM
package
Brocade
NetIron CER
2000 Series
BASE
package
Brocade
NetIron CER
2000 Series
Advanced
Services
package
IPv6 VRRP-E
short path
forwarding for
MCT
Yes Yes Yes Yes Yes Yes Yes