Vs LACP LAG between two PowerConnect 5448 s

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• LACP hash between N3048 and CISCO SG300/SG200 + question Twinax attach direct cable

  Hello

  In my network I have deployed two new N3048 with 2 transceivers SPF + and SPF module back + as core switches are connected to other 3 switches from edge of N2048 using optical fiber and I reused my previous CISCO SG300 and SG200 goes to serve the other two boxes of my campus via the spine in copper.

  I have 4 copper cable which starts from the hub of the SG300 network and 2 the SG200 brass. I set up to have a redundant connection using 2 + 2 with SG300 and 1 + 1 with SG200 RSTP.

  So for the SG300 I re LAG + LACP to have two channels of the N3048s port, but now that a single cable is connected because I don't know what kind of LACP hash mode should I put on N3048 to have a compatible hash between Dell and Cisco switches.

  My N3048 have mode 7 (Advanced hash) as default but I guess that cisco models do not understand... so, what mode is the best for LACP work perfectly with small business cisco switches?

  I also received my twinax cables to connect my two N3048 via SPF + back modules... conhot can I plug the cables into the slots SPF + (already mounted) without turning off my basic switches?

  Thank you!

  See you soon

  Cables can be connected/disconnected, but I don't know if the real module SFP + for the rear of the N3000 is hot plug.

• Dell Powerconnect 5448 a reference on the vlan by default

  Hello

  Just a question.  A Dell Powerconnect 5448 switch will act as a home if its interfaces are configured with 1 interface connection to a primary switch that has the interface is 'access to the interface mode' by default with a vlan?  It will work with all its switches on vlan interface of uplink or would you need to configure both as the trunks to allow access vlan to work and this switch uplink?

  The 5448 is a layer 2 switch, which by default has a VLAN native of 1 with all interfaces in access mode for the native VLAN 1. On the VLAN native all frames are frames unmarked. So now that your uplink to the other switch port, all the info will be sent without label, which means the other switch will receive the unmarked data and then place it in the VLAN that is in access mode. Communication should work this way.

  However, I think using a network connection between the switches. The trunk port is used to connect the devices up-to-date with the switches / VLAN together and allow several VLAN tagged fell on it. Looks like you already have several VLANs on the network, and having a network connection will allow you to expand on it. At the same time everything that is on the VLAN native is always through the trunk to the other switch and will stay on the VLAN native.

• Catalyst 3560 liaison network between two servers ubuntu 12.04

  Hello world

  I'm trying to transfer data with more than 1 Gbit/s between two servers, but I just get a card (approximately 1 Gbps) NETWORK performance. Here is my configuration:

  srvnettest1 and srvnettest2 are two 12.04 servers ubuntu with three network cards in each. management eth0, eth1 and eth2 are network cards that should work as a team. ;-) Here are the relevant parts of fit it:

  [email protected]/* */:~# less /etc/network/interfaces
  ...
  auto bond0
  iface bond0 inet static
  address 172.16.200.100
  netmask 255.255.255.0
  bond-mode 4
  bond-miimon 100
  bond-slaves none
  bond-lacp-rate 1
  bond-primary eth1 eth2
  auto eth1
  allow-bond0 eth1
  iface eth1 inet manual
  bond-master bond0
  auto eth2
  allow-bond0 eth2
  iface eth2 inet manual
  bond-master bond0
  ...
  
  

  
  [email protected]/* */:~# less /etc/network/interfaces
  ...
  auto bond0
  iface bond0 inet static
  address 172.16.200.200
  netmask 255.255.255.0
  bond-mode 4
  bond-miimon 100
  bond-slaves none
  bond-lacp-rate 1
  bond-primary eth1 eth2
  auto eth1
  allow-bond0 eth1
  iface eth1 inet manual
  bond-master bond0
  auto eth2
  allow-bond0 eth2
  iface eth2 inet manual
  bond-master bond0
  ...
  
  

  It's the switch configuration (btw, this is a version of IOS in course WS-C3560G-48TS 12.2 (55) SE)

  Switch#show running-config
  ...
  interface Port-channel10
  switchport access vlan 200
  switchport mode access
  !
  interface Port-channel20
  switchport access vlan 200
  switchport mode access
  !
  interface GigabitEthernet0/1
  switchport access vlan 200
  switchport mode access
  channel-group 10 mode active
  !
  interface GigabitEthernet0/2
  switchport access vlan 200
  switchport mode access
  channel-group 10 mode active
  !
  interface GigabitEthernet0/3
  switchport access vlan 200
  switchport mode access
  channel-group 20 mode active
  !
  interface GigabitEthernet0/4
  switchport access vlan 200
  switchport mode access
  channel-group 20 mode active
  ...
  

  This is my summary etherchannel:

  Switch#show etherchannel summary
  Flags:  D - down        P - bundled in port-channel
  I - stand-alone s - suspended
  H - Hot-standby (LACP only)
  R - Layer3      S - Layer2
  U - in use      f - failed to allocate aggregator
  M - not in use, minimum links not met
  u - unsuitable for bundling
  w - waiting to be aggregated
  d - default port
  Number of channel-groups in use: 2
  Number of aggregators:           2
  Group  Port-channel  Protocol    Ports
  ------+-------------+-----------+-----------------------------------------------
  10     Po10(SU)        LACP      Gi0/1(P)    Gi0/2(P)
  20     Po20(SU)        LACP      Gi0/3(P)    Gi0/4(P)
  

  My test tools are nuttcp (by transfer) and bmon (to watch what is happening during the transfer). Unfortunately, I am not able to transfer more than 1 Gbps:

  [email protected]/* */:~# nuttcp -i1 172.16.200.100
  97.1875 MB /   1.00 sec =  815.2409 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.4763 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.7321 Mbps     0 retrans
  98.1250 MB /   1.00 sec =  823.1001 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.5306 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.7560 Mbps     0 retrans
  98.1250 MB /   1.00 sec =  822.9890 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.6753 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.5528 Mbps     0 retrans
  98.0625 MB /   1.00 sec =  822.7058 Mbps     0 retrans
  982.5000 MB /  10.03 sec =  821.9606 Mbps 21 %TX 37 %RX 0 retrans 0.32 msRTT
  

  In bmon, I see that a NIC (eth1) of bond0 the uplink and the other a (eth2) made the downlink:

  #   Interface                RX Rate         RX #     TX Rate         TX #
  qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
  srvnettest2 (source: local)
  0   lo                         0.00B            0       0.00B            0
  1   eth2                     269.26KiB       4175       0.00B            0
  2   eth1                     123.00B            0     102.56MiB      71030
  3   eth0                     179.00B            2     491.00B            1
  4   bond0                    269.38KiB       4176     102.56MiB      71030
  

  I tried a lot of things, but now I have no idea what to do or what to try next. It is true that I have no deep understanding of Cisco etherchannels yet, so I guess that my mistake is somewhere in the IOS configuration.

  Thanks a lot for your support and welcome to Germany

  Stephan

  Hello Stephan,

  With EtherChannels, a single flow (the flow of images/packages with the same source and destination) is always carried by a single link only. Implementation of Cisco implements not balancing on connections in an EtherChannel load by package, and it avoids a reason: executives could get reorganized, something this plain Ethernet never should do. This means that you will not see an improvement in bandwidth on the speed of a single link to your EtherChannel for a single stream. It is only the overall bandwidth for several stream which increases. The advantage of EtherChannel becomes therefore obvious that if your server starts many conversations and several stream handling.

  Best regards

  Peter

• calculation of time between two time as timestamp

  How can calculate two hour, START as the timestamp TIME in the data type, END TIME as of time also.

  select END_TIME-START_TIME from PROG_DLY_WORK
  

  Result

  + 01:50:00.000000 000000000

  How can get exactly the time spent as 01:50 ? and these calculated time must sum (elapsed_time) in another column.

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  Product	VERSION	STATUS
  NLSRTL	11.2.0.3.0	Production
  Oracle Database 11g Enterprise Edition	11.2.0.3.0	64 bit Production
  PL/SQL	11.2.0.3.0	Production
  AMT for Linux:	11.2.0.3.0	Production

  Time difference between two columns in hours

  Start

  FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

  LOOP

  UPDATE CALc_TIME

  SET ELAPSED_TIME = round (())

  TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")-

  TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")

  () * 24).

  WHERE CAL_ID = REC. CAL_ID;

  END LOOP;

  end;

  Lag in minutes

  Start

  FOR REC IN (SELECT START_TIME, END_TIME, CALC_TIME CAL_ID)

  LOOP

  UPDATE CALc_TIME

  SET ELAPSED_TIME = round (())

  TO_DATE (to_char (REC. End_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")-

  TO_DATE (to_char (REC. Start_time, 'ddmmyyyyhh24miss'),

  "ddmmyyyyhh24miss")

  () * 24 * 60)

  WHERE CAL_ID = REC. CAL_ID;

  END LOOP;

  end;

• How to caluclate tat between two dates of a timestamp field

  Hello
  could help to caluclate days between two dates and unique timestamp filed with this
  query
  Select * from m_activity_transaction where actn_opp_id in)
  Select actn_opp_id in the m_activity_transaction where ACTN_ACTV_ID = 218
  Actn_opp_id group
  view count (*) > 1) and ACTN_ACTV_ID = 218
  order of actn_performed_on
  IAM get output is
  
  ACTN_ID ACTN_OPP_ID ACTN_PERFORMED_ON
  319415 95831 JANUARY 27, 12 AM 11.06.20.000000
  315249 95831 8 FEBRUARY 12 05.32.54.000000 PM
  301927 103509 20 DECEMBER 11 04.01.43.000000 PM
  301458 103509 19 DECEMBER 11 04.51.03.000000 PM
  294841 115840 10 JANUARY 12 03.20.12.000000 PM
  312062 115840 11 JANUARY 12 05.17.06.000000 PM
  
  Normand to caluclate number days between two dates like January 27, 12 AM 11.06.20.000000 and I 05.32.54.000000 8 February 12 PM where actn_id is unique AND ACTN_OPP_ID IS NOT UNIQUE.
  Thanks in advance,
  VVR.

  In this way.

  with data as
  (
  select 315249 a, 95831 b, to_date('27-JAN-12 11.06.20 AM', 'DD-MON-RR HH.MI.SS AM') dt from dual union all
  select 319415, 95831, to_date('08-FEB-12 05.32.54 PM', 'DD-MON-RR HH.MI.SS AM') from dual union all
  select 301927, 103509 , to_date('20-DEC-11 04.51.03 PM', 'DD-MON-RR HH.MI.SS AM') from dual union all
  select 301458 , 103509 , to_date('19-DEC-11 04.01.43 PM', 'DD-MON-RR HH.MI.SS AM') from dual union all
  select 363810 , 144656 , to_date('27-JUN-12 12.43.28 PM', 'DD-MON-RR HH.MI.SS AM') from dual union all
  select 363500 , 144656 , to_date('26-JUN-12 11.41.50 AM', 'DD-MON-RR HH.MI.SS AM') from dual union all
  select 363354 , 144656 , to_date('25-JUN-13 12.41.13 PM', 'DD-MON-RR HH.MI.SS AM') from dual
  )
  select a, b, diff_in_days
    from (
          select a, b, trunc(dt - lag(dt) over (partition by b order by dt, a)) diff_in_days
            from data
         ) tab
   where tab.diff_in_days is not null;
  
  A                      B                      DIFF_IN_DAYS
  ---------------------- ---------------------- ----------------------
  319415                 95831                  12
  301927                 103509                 1
  363810                 144656                 1
  363354                 144656                 362
  

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  Hello

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  Table 1
  
  A1  date time string
  A2  20-03-16 00:52:22
  A3  19-03-16 01:26:17
  A4  18-03-16 01:41:30
  A5  16-03-16 00:01:08
  A6  11-03-16 23:40:42
     
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  B6  =DATE("20"&MID(A6,7,2),MID(A6,4,2),MID(A6,1,2))+TIMEVALUE(TIME(MID(A6,10,2),MID(A6,13,2),MID(A6,16,2)))
     
  C1  duration
  C2  =B2-B3
  C3  =B3-B4
  C4  =B4-B5
  C5  =B5-B6
  C6  =B6-B7
  

  Notes.

  Formula in B2 and C2 can be filled down.

  Table is designed with numbers v2.

  Kind regards

  H

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