07-22-2013 07:22 AM
HW: VDX 6730 in VCS mode.
NOS: show sys | incl NOS
NOS Version : 3.0.1
Configure in-band management on VLAN ID 1 for a VDX which has only 1(one) active 10GbE Port ( int te 2/0/5) and the Mgmt Port as well as a dedicated VLAN can not be used right now. So we are stuck to the default vlan 1 .
Section: 9.3.2 Configure In-band Management via Physical Interface the following logic should be applied.
int te x/y/z
ip address a/b
ip mtu 1200
ip arp-ageing-timeout 300
do clear arp no-refresh
Does the "ip mtu 1200" means that all packets going through this port and larger as 1200 will be fragmented ? Pretty bad on a 10GbE link.
Does the "ip mtu 1200" is even necessary ? And if yes , why ?
07-29-2013 01:17 AM
what i can say that the default on access (edge) ports is currently "mtu 2500" - and in your example config all frames get fragmented that are larger than those MTU. I don't know the reason because there is only management-traffic on this port and it is not nessecary. If you don't wanna spend a 10G port only for Management i prefer the 1g mangement port like that:
interface Management 1/0
no ip address dhcp
ip address x.x.x.x/x
ip gateway-address 0.0.0.0
no ipv6 address dhcp
no ipv6 address autoconfig
and maybe a route under the rbridge-id 1.
All in VCS Mode.
07-30-2013 05:40 AM
thx for answering. My current solution is:
I tried to use VLAN 1 by creating a virtual interface Ve to access the management port but it does not work.
Answer from brocade support:
vdx6730-3(config-rbridge-id-3)# interface Ve 1
%Error: Creating Ve interface with default vlan ID is not allowed
This is the designed behavior of NOS 3.0.1 code. A feature request has been requested to add this functionality and is tentatively scheduled for NOS 4.0.1 code. You can use DEFECT000440702 for your reference.
07-30-2013 05:43 AM
thanks for that feedback. The most that came from the other big company do not like to use vlan 1 :-) so maybe that 3.x engineer also or maybe he comes from there