Wednesday, April 22, 2015

Cisco Prime Lan management solution 4.2 Useful Links for begineers



Beginner of Cisco Prime LMS 4.2

please go through below link will be helpful for understanding and implementing cisco LMS







https://www.youtube.com/watch?v=F6ya19RITuI&list=PLA38519EC8791002F


 Compliance_and_Audit_Manager

http://www.cisco.com/web/learning/le31/le46/nmtg_training/vods/lms/lms42/compliance/Compliance_and_Audit_Manager.htm

WPAD DNS QUERY ISSUE

Hi Friends,

In an network environment, PC is configured as " automatically detect settings" on Internet explorer, it will query for the proxy server using WPAD (Web Proxy Auto discovery Protocol). it can be achieve two ways DHCP / DNS server.

here problem we faced in DNS server,

Application team has migrated to New DNS server 2012.  From PC , we are unable to ping wpad.domin.name but it exist in the DNS server.after all the troubleshooting, we found above Microsoft 2008, global query block list is enabled . hence, WPAD will have local IP address will not be resolve untill it is unblocked.


Use the dnscmd command-line tool to manage the global query block list. Open a command line prompt, and then do the following:
  1. To check whether the global query block is enabled, type the following:
    dnscmd /info /enableglobalqueryblocklist
  2. To display the host names in the current block list, type the following:
    dnscmd /info /globalqueryblocklist
  3. To disable the block list and ensure that the DNS Server service does not ignore queries for names in the block list, type the following:
    dnscmd /config /enableglobalqueryblocklist 0
  4. To enable the block list and ensure that the DNS Server service ignores queries for names in the block list, type the following:
    dnscmd /config /enableglobalqueryblocklist 0


Monday, April 13, 2015

how to troubleshoot DHCP issue on cisco switch ( Not getting IP address on the desktop)

Hi Friends,

I have faced a interesting problem in Cisco switch.


DHCP Server --> CORE Switch --> Distrubution Switch ---> Access Switch---> Desktop

Issue : Desktop not receiving IP address from DHCP server.


I have troubleshoot the issues as follows.

1. Verified Desktop is connected on correct VLAN.
2, Vlan is allowed on Trunk.
3. Verified DHCP snooping enabled.
4. Verified on SVI - ip helper address configured
5. reachability  to DHCP server is verified by assigning static IP address on the desktop.

by this time, i could not notice any issues on the network, if assigning static IP address is working fine, but not getting IP address from DHCP.

Finally i have found that it failed due to wrong root bridge selected.

sh spanning-tree vlan id X.

please ensure that VLAN root bridge should be switch has SVI interface, not that access switch.

remove spanning-tree vlan priority 0 if configured.


Regards






Wednesday, April 1, 2015

How to configure Cisco 3 / 4 G router ( Etisalat)




Please find configuration of Cisco router - 4G

router#cellular 0 lte profile create 1 Etisalat none

chat-script lte "" "AT!CALL1" TIMEOUT 20 "OK"

!
interface Cellular0
 description Primary_4GLTE
 ip address negotiated
 ip nat outside
 ip virtual-reassembly in
 encapsulation slip
 dialer in-band
 dialer pool-member 1
 dialer-group 1
 async mode interactive
!
!
interface Vlan1
 ip address 10.10.10.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
!
interface Dialer1
 ip address negotiated
 ip nat outside
 ip virtual-reassembly in
 encapsulation slip
 dialer pool 1
 dialer idle-timeout 0
 dialer string lte
 dialer persistent
 dialer-group 1
!
!
ip nat inside source list 198 interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
dialer-list 1 protocol ip permit
!
access-list 198 permit ip any any
!
line 2
 no activation-character
 no exec
 transport preferred none
 transport input all
 stopbits 1
line 3
 script dialer lte
 modem InOut
 no exec
 transport input all
 speed 384000