Here is a quick how to reset Cisco ASA (Adaptative Security Appliance) to factory default. You will need a serial console access to achieve this task. 1. At early boot process, just hit escape [esc] key when suggested as followed : Cisco Systems ROMMON Version (1.0(12)13) #0: Thu Aug 28 15:55:27 PDT 2008 Platform ASA5505… Read More »
Follow this quick tutorial to enable SSH access instead of Telnet and create a unprivileged user on Cisco IOS. 1. Enter in “Privilege EXEC” mode : enable 2. Enter in “Global Configuration” mode : conf t 3. Use the following commands to enable SSH, generate RSA keys and create the username/password : hostname <HOSTNAME> domain-name <FQDN.DOMAIN.TLD>… Read More »
Having problem setting LACP interface on JunOS and got this “error: device ae0 not found” message? root@EX4200> show lacp interfaces ae0 error: device ae0 not found First, make sure the LACP interface members are properly configured : set interfaces ge-0/0/0 ether-options 802.3ad ae0 set interfaces ge-0/0/0 description “<OPTIONAL_DESCRIPTION>” set interfaces ge-0/0/1 ether-options 802.3ad ae0 set… Read More »
The following error may occur importing an existing configuration from an EX virtual chassis member to another : re0: (vccpd): [member]: Member’s information missing from provisioning database re0: configuration check-out failed This is probably because you haven’t changed the device(s) serial numbers with the ones matching your new device. Edit the configuration file and replace… Read More »
You may end up with the following error trying to create a LACP (802.3ad) bonded interface on your Juniper device : Error(s): ‘interface ge-0/0/0.0’ 1) Interface ge-0/0/41.0 not enabled for switching 2) configuration check-out failed This is probably due because you have a VLan interface set for these physical interfaces in your configuration such as… Read More »
Getting this error committing the changes on a pre-provisioned EX switches virtual chassis? root@EX4200# commit synchronize [edit protocols] ‘bgp’ [edit virtual-chassis] ‘member 0’ Can’t have mastership priority configuration with preprovisioned set error: configuration check-out failed {master:0}[edit] root@EX4200# This mean you tried to set a mastership priority on a pre-provisioned configuration and this is not allowed.… Read More »
There are several ways to update your JunOS software but one of the common and safe method is doing through the CLI and a USB memory stick. First, get your software from Juniper.net first and save it to a MSDOS formatted USB stick. Then, follow those steps (as root, through serial console is highly recommended)… Read More »
Here is how to configure DHCP forwarding across VLans on JunOS Juniper devices. set forwarding-options helpers bootp server <DHCP_SERVER_IP> set forwarding-options helpers bootp interface vlan.<VLAN_ID> Example : Assuming your DHCP server IP is “192.168.1.1” and the VLans you want DHCP forwarding enabled are “1” and “2” : set forwarding-options helpers bootp server 192.168.1.1 set forwarding-options… Read More »
Here is a quick how to force your network interface speed and duplex on RHEL/CentOS Linux. Make sure you have the network tools installed : yum install ethtool net-tools To apply the configuration without having to restart the network service or reboot your system, simply do this command with your settings : ethtool -s <INTERFACE>… Read More »
Getting this error doing a commit after assigning a subnet to a L3-interface vlan on your Juniper device? user@EX4200# set interfaces vlan unit 100 family inet address 1.1.1.1/8 user@EX4200# commit synchronize comment “add subnet to vlan 100” [edit protocols] ‘bgp’ [edit protocols] ‘ospf3’ [edit interfaces vlan unit 100 family inet] ‘address 1.1.1.1/8’ Cannot have the… Read More »