Got an issue on Jabber Video 4.6 on Mac, it can login but can't recognize the iSight camera after I upgraded my MBP to Maverick. You need to upgrade to 4.7 in order to fix this issue. I have upgraded to 4.7.4 and works well on my Mac.
Monday, December 23, 2013
Wednesday, December 11, 2013
OTV - Selective Unicast Flooding
Normally in OTV, unknown unicast frames are not flooded between OTV sites and MAC addresses are not learned across the overlay interface. Any unknown unicast messages that reach the OTV edge device are blocked to prevent layer 2 errors spreading to remote sites. It is assumed the end points are not silent or unidirectional. If there is any silent hosts or Microsoft unicast mode NLB is used in your data center, your host will be "disappeared" from the view of other OTV sites. In 6.2(2) and later, a new feature called selective unicast flooding is introduced and you can issue the command on the OTV VDCs at the site where the server / silent host exists, in result the specified destination MAC address is flooded to all other edge devices in the OTV overlay network with that unknown unicast traffic.
otv flood mac 0011.2233.4455 vlan 66
RBAC - san-admin on Nexus 5500
Starting from NX-OS 5.2(1)N1(1), Nexus 5500 has a new predefined role "san-admin" which allows you to provide clear demarcation on what SAN and LAN team can do on the Nexus 5500. You can use this for your DCNM for SAN too. I have tried it on my DCNM 6.2(3) in lab and it works fine. User with this right can do most of the things on DCNM for SAN but not DCNM for LAN. Here is the detail on what a predefined san-admin role can do:
POC-N5K# sh role name san-admin
Role: san-admin
Description: Predefined system role for san administrators. This role
cannot be modified.
vsan policy: permit(default)
Vlan policy: permit(default)
Interface policy: permit(default)
Vrf policy: permit(default)
-------------------------------------------------------------------
Rule Perm Type Scope Entity
-------------------------------------------------------------------
27 permit read
26 permit read-write feature fcdomain
25 permit read-write feature rdl
24 permit read-write feature trunk
23 permit read-write feature fcmgmt
22 permit read-write feature fcfe
21 permit read-write feature port-track
20 permit read-write feature fcoe
19 permit read-write feature port-security
18 permit read-write feature copy
17 permit read-write feature rmon
16 permit read-write feature rscn
15 permit read-write feature fspf
14 permit read-write feature fdmi
13 permit read-write feature fcsp
12 permit read-write feature fcns
11 permit read-write feature span
10 permit read-write feature zone
9 permit read-write feature wwnm
8 permit read-write feature vsan
7 permit read-write feature vsanIfvsan
6 permit read-write feature fabric-binding
5 permit read-write feature interface
4 permit read-write feature trapRegEntry
3 permit read-write feature snmpTargetAddrEntry
2 permit read-write feature snmpTargetParamsEntry
1 permit read-write feature snmp
10GBase-LRM SFP+ support on Nexus
A quick note to bear in mind is 10GBase-LRM SFP+ is not supported on Nexus 5500 and Nexus 2000. It only supports on Nexus 7000 in the Nexus family.
For detail compatibility information please check out here:
Monday, December 2, 2013
UCSM 2.1.3a - Login Error: java.io.IOException: Server returned HTTP response code: 400
Recently I have run into an issue in a customer PoC and encountered a weird issue. Everything looks fine except I cannot login UCSM. The UCSM code I am running is 2.1.3a, and I have got the error message:
"Login Error: java.io.IOException: Server returned HTTP response code: 400 for URL: http://ucsm_ip:443/nuova"
Eventually I've found out the JRE 7u45 update breaks this, after lowering the version it works fine now.
Maverick - No Java runtime present, requesting install
After upgrading to Maverick (OS X 10.9), when I try to run java –version in terminal, it showed the error "No Java runtime present, requesting install", however nothing happens except showing this error message. The solution is to download the official java package from apple website:
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