Dell PowerEdge M820 Systems Notes de mise à jour - Page 26

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Dell PowerEdge M820 Systems Notes de mise à jour
Layer 3
IPv6 MTU
Description
IPv6 Fragmentation Support
IP Routing
Description
Static IP routes do not show with the
show ip route command
VRRP VRID limit is 20.
24
User Impact
The switch is not fragmenting the datagram and forwards even when the IP MTU
of the forwarding interface is set to a lower value (than the datagram size).
IPv6 frames are not allowed to be fragmented. IPv6 frames forwarded in silicon
can be up to the lesser of 9216 octets or the link MTU. These frames are
forwarded by the switching silicon with no effect. If a frame exceeds the link
MTU for a port, it is discarded silently.
If a packet is sent to the CPU or originated on the CPU and it exceeds the IPv6
MTU, then the packet still will not be fragmented. Instead, an ICMP error
message is returned to the sender. The maximum IPv6 MTU is 1500 bytes.
Administrators are advised to only adjust the link MTU and let the system
automatically adjust the IPv6 MTU based on the link MTU.
User Impact
The switch UI will attempt to discourage the configuration of static ip route
entries for which a matching subnet does not exist. Certain configuration
sequences may still allow such routes to be configured. Configuring an IP address
on a VLAN which matches the next hop IP address of the static route in all
significant bits will allow the display of the route using the show command.
The switch will only support VRRP environments with 20 or less VRRP routers.
System Firmware Version 4.1.0.6