Use iperf3.exe to test bandwidth between a client and server by using iperf3 on the command line.
On the server…
iperf3 -s
On the client…
iperf3 -c <host>
Tip: Within File Explorer press shift and right click mouse allows you to open a command line from the directory the executable is in.
The GNS3 appliance template file may not match the filename downloaded and will complain about the MD5 checksum not matching. Make a note of the MD5 checksum for the new filename as you will need this when you edit the appliance .GNS3a file.
For example, the downloadable filename for Windows 7 with IE11 changed from “IE11_-_Win7-disk1.vmdk” to “IE11-Win7-VMWare-disk1.vmdk”.
Find the places where the old filename are mentioned and change the filename to the new filename and alter the md5sum, and no need to alter the filesize.
Before
{
“filename”: “IE11_-_Win7-disk1.vmdk”,
“version”: “7 w/ IE11”,
“md5sum”: “5733cc93a6ed756c2358f0a383b411a8”,
“filesize”: 4101495296,
“download_url”: https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/
},
{
“name”: “7 w/ IE11”,
“images”: {
“hda_disk_image”: “IE11_-_Win7-disk1.vmdk”
}
},
After
{
“filename”: “IE11-Win7-VMWare-disk1.vmdk”,
“version”: “7 w/ IE11”,
“md5sum”: “d682fde5fc4d8fd4374fdeca70fd2011”,
“filesize”: 4101495296,
“download_url”: https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/
},
{
“name”: “7 w/ IE11”,
“images”: {
“hda_disk_image”: “IE11-Win7-VMWare-disk1.vmdk”
}
},
voss01:1#flight-recorder ?
Perform actions on flight-recorder data
all Create flight-recorder snapshot, trace, and archive
archive Create tarball of flight-recorder files, log file, config file, etc.
snapshot Take snapshot of flight-recorder PMEM data
trace Take snapshot of always-on-trace data
voss01:1#flight-recorder all ?
{slot[-slot][,…]} Slot – Valid slot is 1
Example…
flight-recorder all 1
Processing Flight-recorder snapshot for 1 ….
Flight-recorder snapshot for slot 1 complete, filename is /intflash/PMEM/1/pmem.20190311115209.1.tar.gz.
Processing Flight-recorder trace for 1 ….
Flight Recorder trace taken for namServer on slot 1. File: /intflash/flrec/1/trace.20190311115210.namServer-1.txt
Flight Recorder trace taken for cbcp-main.x on slot 1. File: /intflash/flrec/1/trace.20190311115210.cbcp-main.x-1.txt
Flight Recorder trace taken for ssio on slot 1. File: /intflash/flrec/1/trace.20190311115211.ssio-1.txt
Flight Recorder trace taken for logServer on slot 1. File: /intflash/flrec/1/trace.20190311115211.logServer-1.txt
Processing Flight-recorder archive for slot 1 ….
NOTE: Deleting Flight-recorder trace files (if any) from /intflash/flrec/1/ and adding them to the archive
NOTE: Deleting Flight-recorder snapshot files (if any) from /intflash/PMEM/1/ and adding them to the archive
Flight-recorder archive for slot 1 complete, filename is /intflash/archive/1/archive.20190311115212.1.tar
Use the Appliance Upgrade files to update your XMC appliances such as EMC, NAC and Analytics.
SCP to the IP address of the appliance and transfer the upgrade .bin file to a location on the server.
Make the .bin executable using chmod 755 <bin file>.
Run the bin file
./<bin file>
Note:
You will need internet access to complete the upgrade so that Ubuntu packages can be updated.
Check release of Ubuntu by typing command lsb_release -a
Edit /etc/network/interfaces file with nano and add dns-nameservers <DNS server> if not present. The EMC and Analytics allow DNS entries in the interfaces file but NAC uses resolvconf package.
^O Write/Save
^X Exit
On NAC have to use the resolveconf package to setup DNS. Edit /etc/resolvconf/resolv.conf.d/base and enter nameserver <DNS server>.
Sudo resolvconf -u
Bounce the eth0 interface with… sudo ifdown eth0 && sudo ifup eth0
If necessary edit the default route…
ip route del default
ip route add default via <default GW>
ERS 4900, ERS 5900
Base Unit Select switch – used to designate the base unit in a stack. When set DOWN, this unit acts as the Base Unit for the stack. Only one switch in the stack must have the Base Unit Select in base position.
ERS 3500, ERS 3600, ERS 4800
Base Unit Select Switch – used to designate the Base Unit in a stack. When set to the RIGHT position, this unit acts as the Base Unit for the stack.
Add multiple show running config files into a folder and use Grep to pick out specific areas of interest that are hits in those files.
Results will include the files name where there is a match.
Useful Grep options:
grep -A 2 “interface loop” *
grep “ip-source-address” *
grep “ip route pref” *
-A After (2 lines)
-B Before
-i Case insensitive
-c Count
-r Recursive
-v Invert
-l Display filenames that match
* Wildcard for all files in current directory.
Customer’s experiencing error when creating 9th VRRP instance.
Error: maximum number of VRRP entries exceeded
Release notes for version 6.2 explains that it is possible to create more than eight VRRP instances but have to re-use the first eight VRRP IDs chosen previously.
“Because there is a hardware limitation of using only eight MAC addresses for VRRP, the number of VRIDs is also limited to eight. You can use any eight values for VRIDs between 1 and 255. However, once you choose the eight VRID values, you must reuse the same eight values across all VLANs on the device.”
If have problem connecting to EDM with ERS switch after upgrade of the agent code or to browser then try recreating the SSL certificate:
ssl certificate
ssl reset
show ssl
Note: Tested with Firefox 65 (64 bit) and Internet Explorer 11 against ERS 5.3.9.011 with HTTPS. Uses SHA-256 with RSA encryption. Chrome version 72 (64 bit) fails with ‘bad format’ error and may need to use an older release (ERR_SSL_SERVER_CERT_BAD_FORMAT).
Here is a python script which will backup the running-config of multiple ERS switches listed in a text file. This script will send Ctrl + Y code sequence to the switch and run the copy command to a local TFTP server.
Python file sshclientcfg.py:
import paramiko
import time
import getpass
username = raw_input(‘Enter your username: ‘)
password = getpass.getpass()
f = open (‘myswitches.txt’)
for line in f:
ip_address = line.strip()
ssh_client = paramiko.SSHClient()
ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_client.connect(hostname=ip_address,username=username,password=password)
print ‘Successful connection’, ip_address
remote_connection = ssh_client.invoke_shell()
remote_connection.send(“\x19”)
print ‘Collecting running-config of ‘ + ip_address
remote_connection.send(‘copy running-config tftp address 192.168.1.100 filename ‘ + ip_address + ‘.asc\n’)
time.sleep(20)
readoutput = remote_connection.recv(655350)
saveoutput = open(‘Log file of ‘ + ip_address, ‘w’)
print ‘Saving to file called Log file of ‘ + ip_address + ‘\n’
saveoutput.write(readoutput)
saveoutput.write(‘\n’)
saveoutput.close
ssh_client.close()
Text file Myswitches.txt:
192.168.1.5
192.168.1.4
Output of script:
$ python sshclientcfg.py
Enter your username: admin
Password:
Successful connection 192.168.1.5
Collecting running-config of 192.168.1.5
Saving to file called Log file of 192.168.1.5
Successful connection 192.168.1.4
Collecting running-config of 192.168.1.4
Saving to file called Log file of 192.168.1.4
Note: The log file captured with the IP of the switch shows the output from the session which is useful to verify if it worked as expected or there was an error. The running-config file generated by the switch will be sent to the TFTP server so look there for the ASCII file.
The line below is used to provide Ctrl + Y response if prompted.
remote_connection.send(“\x19”)
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