ARP (Address Resolution Protocol) is a network protocol used to map an IP address (Layer 3) to a corresponding MAC address (Layer 2) on a local area network (LAN). These are sample ways to find ARP on Cisco ASR 9000 running on IOS-XR. To find out the ARP statistics for a particular linecard, the command would be: show arp traffic location 0/X/CPU0 where X is the Slot number Example: RP/0/RSP0/CPU0:ASR9000#show arp traffic location 0/7/CPU0 ARP statistics: Recv: 2493913945 requests, 2796126129…
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Here are the step by step configuration of implementing Access-Lists or ACL on Huawei routers such as NetEngine Series Routers utilizing the ip-pool and source-pool for simplicity and convenience. 1.Create ip-pool and source-pool acl ip-pool allowed_ip ip address 192.168.0.0 0.0.0.255 acl port-pool allowed_port eq 22 2. Create ACL acl number 88 description ACL88 rule 10 permit tcp source-pool allowed_ip destination-port-pool allowed_port rule 20 deny tcp destination-port-pool allowed_port rule 30 permit ip 3. Create traffic policy and apply ACL traffic classifier…
Here are the step by step configuration of implementing Access-Lists or ACL on Cisco routers such as ASR9000 running on IOS-XR, utilizing the object-group for simplicity and convenience. 1.Create object-group object-group network ipv4 allowed_ip 192.168.0.0/24 object-group port allowed_port eq ssh 2. Create ACL ipv4 access-list ACL88 10 permit tcp net-group allowed_ip any port-group allowed_port 20 deny tcp any any port-group allowed_port 30 permit ipv4 any any 3. Apply ACL interface Te0/0/0/0 ipv4 access-group ACL88 egress Verification: show object-group network ipv4…
For checking transmission links on Cisco Routers, it is good to know how to find out the optical power of 100GE modules or interfaces for troubleshooting and making sure the desired or optimal range is meet. Here are the sample commands for checking the Transmit/Output (TX) and Receive/Input (RX) optical power. show interfaces diagnostics optics <interface-name> Sample Output: fnt@JUNIPER-ROUTER1-re0> show interfaces diagnostics optics et-0/0/0 Physical interface: et-0/0/0 Module temperature : 28 degrees C / 82 degrees F Module voltage :…
For checking transmission links on Cisco Routers, it is good to know how to find out the optical power of 100GE modules or interfaces for troubleshooting and making sure the desired or optimal range is meet. Here are the sample commands for checking the TX/RX optical power. show controllers <100G interface name> phy Sample Output: RP/0/RSP0/CPU0:CISCO-ROUTER#show controllers HundredGigE0/1/0/0 phy PHY data for interface: HundredGigE0/1/0/0 Rx 64B66B Lane Sync PCS Virt PCS Service Block Marker Header Lane Lane Lane Lane Lock…
For checking transmission links on Huawei Routers, it is good to know how to find out the optical power of 100GE modules or interfaces for troubleshooting and making sure the desired or optimal range is meet. Here are the sample commands for checking the TX/RX optical power. display interface 100GE <slot number> Sample Output: <Huawei-Router>display interface 100GE 5/0/0 100GE5/0/0 current state : UP (ifindex: 146) Line protocol current state : UP Link quality grade : GOOD Description: Connection to RouterA…
These are common computer networking acronyms that you must know and you will encounter if you are in Information Technology (IT) or Telecommunication (Telco) industry especially if your are working as network and systems engineer. Acronyms Meaning ACL Access Control List AD Advertised Distance AS Autonomous System ASA Adaptive Security Appliance ARP Address Resolution Protocol BER Bit Error Rate BGP Border Gateway Protocol CDN Content Delivery Network CIDR Classless Inter-Domain Routing CIR Committed Information Rate CLI Command Line Interpreter CMTS…
Here are the steps on committing/saving and rollback configuration on Huawei Routers system-view commit or system-view commit label <String 1-256> Example: Change1: Change description on Ether-Trunk88 Change2: Enable ipv6 <Huawei>system-view [~Huawei]interface Eth-Trunk88 [*Huawei-Eth-Trunk88]description Connection to Router1 [*Huawei-Eth-Trunk88]commit label Eth88Desc description Eth88IntDesc Committing…..done. [~Huawei-Eth-Trunk88]ipv6 enable [~Huawei-Eth-Trunk88]commit label Eth88v6Enable Verification: display configuration commit list display configuration commit list verbose Example: [~Huawei-Eth-Trunk88]display configuration commit list ——————————————————————————– No. CommitId Label User TimeStamp ——————————————————————————– 1 1000000044 Eth88v6Enable admin 2023-07-06 22:34:42 2 1000000043 Eth88Desc admin 2023-07-06…
Border Gateway Protocol or BGP, is a gateway protocol that enables the Internet to exchange routing information between AS or Autonomous Systems. It is used by Large Enterprise and Service Providers. Here are the recommended Best Security Practices that need to be implemented on your Juniper Routers. Authentication need to be set for all peering using MD5 set protocols bgp group <group_name> authentication-key <MD5 key> There are few supported authentication that you can use aes-128-cmac-96 Cipher-based Message Authentication Code (AES128)…
Option1: If the current line cards installed support your PC/laptop’s 1GE UTP port, then you can install SFP-1000BaseT(SFP-T) transceiver directly to be used as the observing port. Fig.1 interface <interface name> port-mirroring inbound port-mirroring outbound port-mirroring to observe-index 1<1-255> interface <interface name> port-observing observe-index <1-255> Sample Configuration: Objective: To further do analysis on all traffic going to the Web server by port mirroring the interface going to the server. Port to mirror: Gi2/0/0 Port to observe:Gi1/0/0 <HW-Router>sys Enter system…
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