Enable Traceoption and manually update security update on Juniper JunOS SRX
In our environment, there was having issue to use NSM push security update to one pair of Juniper SRX 240. NSM is the only method to get update from Internet…
Cisco Switchport Mode Best Practices
For Access Mode: switchport mode access switchport nonegotiate switchport access vlan 100 For Trunk Mode:switchport trunk encapsulation dot1qswitchport mode trunkswitchport nonegotiateswitchport trunk allowed vlan 10,100switchport trunk native vlan 1 The…
Basic MPLS Lab on GNS3
Topology: IOS: c3640-jk9s-mz.124-16.bin GNS3 IOS Configuration: Changed XTERM to gnome-terminal for better copy&paste feature: In GNS3 Preference , replaced xterm -T %d -e ‘telnet %h %p’ >/dev/null 2>&1 & with…
Cisco MPLS IOS for GNS3
Here are listed working IOS for MPLS LAB on GNS3: c3640-jk9s-mz.124-16 c3640-jk9s-mz.124-16a c3640-jk9o3s-mz.123-14.T7 c7200-adventerprisek9-mz.124-11.T c3725-adventerprisek9-mz.124-15.T10 Note: c3640-jk9s-mz.124-16是学习Gisco过程中最我们最常用IOS,此IOS不单单支持路由交换实验，同时还支持IPv6、VPN、VOip、MPLS-VPN 等，所以人们通常称之为全能型IOS。
BGP Command : soft-reconfiguration inbound & soft in
When you apply policy changes, they are only applied on routes that are learned after the policy changes have been enacted. This is because BGP is most frequently implemented on…
Find out Linux CPU Utilization on Checkpoint Firewall
1. Top Command top – 10:57:46 up 3 min, 2 users, load average: 1.24, 0.86, 0.35Tasks: 66 total, 3 running, 63 sleeping, 0 stopped, 0 zombieCpu(s): 0.0%us, 0.3%sy, 0.0%ni, 99.0%id,…
Check Cisco Device Interface Throughput with load-interval Command
BGP_1#sh int g0/1 GigabitEthernet0/1 is up, line protocol is up Hardware is iGbE, address is e02f.6d05.c401 (bia e02f.6d05.c401) Internet address is 6.99.9.30/32 MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10…
VRRP and Object Tracking
Having following requirements to configure First Hop Redundancy Protocol for one environment:1. Use least public ip addresses2. Track Internet facing interface and BGP routes3. Primary router is high priority and…
Why Cisco Devices refused SSH connection
Network devices usually managed through SSH services. Sometimes, those devices lost SSH access with” The remote system refused the connection.” error message presenting on the SSH client such as SecureCRT.…
Basic F5 LTM HTTP Load Balance Configuration (Without Firewall)
Some Other related posts in this blog: F5 Big IP 2000s Appliance Initial Configuration F5 BigIP LTM v11.5.3 Virtual Appliance Configuration – Part 1 F5 BigIP LTM v11.5.3 Virtual Appliance…
Download and Install F5 BIG-IP v11.x / Virtual Edition 11.3.x into Vmware Workstation
Some Other related posts in this blog: F5 Big IP 2000s Appliance Initial Configuration F5 BigIP LTM v11.5.3 Virtual Appliance Configuration – Part 1 F5 BigIP LTM v11.5.3 Virtual Appliance…
SRX alarm: Autorecovery information needs to be saved
One of our srx system alarm light is on. Check system alarms and fond this: admin@srx-1> show system alarms node0: ————————————————————————– 1 alarms currently active Alarm time Class Description 2013-03-13…