Dell PowerEdge M915 Note di rilascio - Pagina 26

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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.

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