Category: <span>Cisco</span>

Scenario:2 physical interfaces bundled together (port-channel) and associated in the same vlan. Tested in:Cisco NexusJuniper EX Series Steps Cisco Juniper Configure 2 physical interfaces interface Ethernet1/1description Server Link#1switchportswitchport access vlan 888channel-group 99 mode activeno shutdown interface Ethernet2/1description Server Link#2switchportswitchport access vlan 888channel-group 99 mode activeno shutdown #set interfaces xe-0/0/0 description ” Server Link#1 “#set interfaces xe-0/0/0 gigether-options 802.3ad ae99 #set interfaces xe-1/0/0 description ” Server Link#2 “#set interfaces xe-1/0/0 gigether-options 802.3ad ae99 Configure the port-channel interface port-channel99description Server Port-channelswitchportswitchport access…

Cisco Juniper

uRPF or Unicast Reverse Path Forwarding is a security feature/tool that help verifies reachability of source address in packets being forwarded. It can prevents malicious and spoofing attacks as it will perform forwarding table lookup on the source IP address. – it as defined in RFC3704 – it follows RFC2827 for ingress filtering. –  it relies on the CEF (Cisco Express Forwarding) or FIB table to perform lookups. – preferably implemented at the network edge facing internet, customers and servers…

Cisco

Here’s the Cisco IOS commands vs Huawei OS commands Cisco IOS Huawei BASIC show display     | include | include exit quit end return configure terminal system-view shutdown shutdown  no shutdown undo shutdown     no undo  clear  reset debug debugging show running-config display current-configuration show startup-config display saved-configuration show version display version    show tech-support display diagnostic-information clear counters <interface> reset counters <int> clear line <line><line number>     terminal length <num>   screen-length disable terminal width <num>…

Cisco

As per Cisco documentation, Smart Call Home offers proactive diagnostics and real-time alerts on select Cisco devices, which provides higher network availability and increased operational efficiency. There are few ways on sending these alerts, it can be either by email or http. Sample Configuration using Email Method: callhome contract-id [value] switch-priority 7 email-contact [email-address] phone-contact [phone number] streetaddress [address] distribute destination-profile [PROFILENAME] destination-profile [PROFILENAME] format XML destination-profile [PROFILENAME] message-size [value] destination-profile [PROFILENAME] message-level 2 destination-profile [PROFILENAME] email-addr callhome@cisco.com destination-profile [PROFILENAME]…

Cisco

As per Cisco documentation: A virtual PortChannel (vPC) allows links that are physically connected to two different Cisco Nexus devices to appear as a single Port Channel to a third device. The third device can be a Cisco Nexus 2000 Series Fabric Extender or a switch, server, or any other networking device. A vPC can provide Layer 2 multipathing, which allows you to create redundancy by increasing bandwidth, enabling multiple parallel paths between nodes and load-balancing traffic where alternative paths…

Cisco

AAA(TACACS) aaa accounting exec default start-stop group <GROUPNAME> group tacacs+aaa accounting commands default start-stop group <GROUPNAME> group tacacs+aaa group server tacacs+ <GROUPNAME>  vrf management server-private <ISE/TACACS IP#1> port 49  key 7 <TACACS KEY> ! server-private <ISE/TACACS IP#2> port 49  key 7 <TACACS KEY>  !aaa authorization exec default group <GROUPNAME> group tacacs+ noneaaa authorization commands default group <GROUPNAME> group tacacs+ noneaaa authorization eventmanager default group tacacs+aaa authentication login default group <GROUPNAME> group tacacs+ localaaa default-taskgroup netadmin SSHv2 ssh server v2ssh server vrf defaultssh server…

Cisco

Link Aggregation Control Protocol or  IEEE 802.3ad (LACP) is an open standard of Ethernet link aggregation protocol. It is a method used by routers/switches to automatically establish link aggregation groups or LAG ( sometimes called as channel groups, bundle or port-channels). Here’s LACP configuration examples for different Cisco platforms using LACP active mode, where it places a port into an active negotiating state and sending LACPDU (Data units) at regular intervals to seek out partners IOS (Catalyst 4500) Configuration: interface…

Cisco

As per Cisco definition: Hot Standby Router Protocol (HSRP) provides redundancy for IP networks, ensuring that user traffic immediately and transparently recovers from first hop router failures. HSRP allows multiple routers on a single LAN to share a virtual IP and MAC address which is configured as the default gateway on the hosts. From the group of routers configured in an HSRP group, there is one router elected as the active router and another as a standby router. The active…

Cisco

As per Cisco documentation, Smart Call Home offers proactive diagnostics and real-time alerts on select Cisco devices, which provides higher network availability and increased operational efficiency. There are few ways on sending these alerts, it can be either by email or http. Sample Configuration using Email Method call-home service active sender reply-to <sender-email-address> sender from <sender-email-address> mail-server <SMTP Server IP> priority <1-100> phone-number <+contact person phone number> contact-email-addr <contact-person-email-add> street-address “<street add,city,state,zipcode> profile <profilename> active destination address email <dest-email-address> destination…

Cisco

Assuming you have this type of card on your Cisco ASR9000 Series Router and inserted on Slot 0 A9K-MOD80-SE –> 80G Modular Linecard, Service Edge Optimized A9K-MPA-4X10GE –> ASR 9000 4-port 10GE Modular Port Adapter Here’s the following commands that can be used: show pfm location all show asic-errors all location 0/0/cpu0 show controllers fabric fia stats location 0/0/cpu0 show controllers np counters all location 0/0/cpu0 show controllers fabric fia stats location 0/0/cpu0 show controllers fabric crossbar statistics instance 0…

Cisco