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…
Tag: <span>Cisco</span>
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…
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…
PAT or Port Address Translation or also known as NAT Overloading is like a modified form of dynamic NAT where multiple inside local addresses are translated to single inside global IP address. It is the most popular form of NAT as the setup is the same what we use on our home connectivity as your Internet Service Provider (ISP) usually will only provide you 1 public IP to communicate with their internet router. Just remember the word many-to-one mapping. Objective:…
Here are the sample steps on finding the interface where the host is connected based on IP address or MAC address on Cisco Catalyst L3 Switch running on Cisco IOS Scenario 1: IP address is given, find which interface it is connected IP address: 192.168.0.35 a. Find the routing entry for the IP to know where it is connected show ip route <IP> SWITCH1#show ip route 192.168.0.35 Routing entry for 192.168.0.32/29 Known via “connected”, distance 0, metric 0 (connected, via…
Cisco BVI (Bridge Virtual Interface) enables Layer 3 routing on a bridge group, connecting different Layer 2 networks. BVI (Bridge Group Virtual Interface) is a routed interface that represents a set of interfaces that gets bridge. Here is the sample Bridge Virtual Interface (BVI) Configuration on Cisco ASR 9000. Fig1. Configuration: RP/0/RSP1/CPU0:ASR9000#configure Configure the interface interface GigE0/0/0/0 description Connection to Server1 eth0 l2transport Configure the l2vpn l2vpn bridge group 1000 bridge-domain 1000 interface GigE0/0/0/0 routed interface BVI1000 3.Configure the Bridge…
Interface description is one of the most important configuration when bringing up interfaces between two devices. In a bundle or port-channel interface, there is a way to find the partner interface or which member in that bundle is your interface or port is connected especially if there’s no description or outdated. Here are the steps and commands to find LACP partner interface or port in Cisco Router and Switch Fig1.1 (Cisco IOS-XR) Assuming we have this Fig1.1, two…
Here are the steps on performing the switchover of Route Switch Processor (RSP) or Route Processor (RP) in Cisco ASR9000 platforms running in Cisco IOS-XR. show redundancy Example: RP/0/RSP0/CPU0:IOS-XR#show redundancyRedundancy information for node 0/RSP0/CPU0:==========================================Node 0/RSP0/CPU0 is in ACTIVE roleNode Redundancy Partner (0/RSP1/CPU0) is in STANDBY roleStandby node in 0/RSP1/CPU0 is readyStandby node in 0/RSP1/CPU0 is NSR-not-configuredNode 0/RSP0/CPU0 is in process group PRIMARY roleProcess Redundancy Partner (0/RSP1/CPU0) is in BACKUP roleBackup node in 0/RSP1/CPU0 is readyBackup node in 0/RSP1/CPU0 is NSR-ready…
Here’s the basic BGP (eBGP) configuration of connecting 3 different router vendors namely Huawei, Juniper and Cisco Routers. Assuming we connect via their physical interfaces and incoming and outgoing policies are basically allow all. Sample Configuration Huawei <Huawei>system-view Enter system view, return user view with return command. [~Huawei] interface GigabitEthernet1/0/0 description Connection to Cisco ip address 192.168.0.1 255.255.255.252 interface GigabitEthernet1/0/1 description Connection to Juniper ip address 192.168.1.1 255.255.255.252 xpl route-filter Cisco-Import approve end-filter xpl route-filter Cisco-Export approve end-filter xpl route-filter…
Here are the sample VLAN configuration and commands comparing Cisco Nexus and Huawei switches. VLAN Creation: Cisco Huawei configure system-view vlan 88name VLAN 88 vlan 88name VLAN88 Access Interfaces: Cisco Huawei interface Ethernet1/1description Connection to Server1switchportswitchport access vlan 88no shutdown interface GigabitEthernet1/1/1description Connection to Server1port link-type accessport default vlan 88undo shutdown Trunk Interfaces: Cisco Huawei interface Ethernet2/1description Connect to Switch2switchportswitchport mode trunkswitchport trunk allowed vlan 10,20no shutdown interface GigabitEthernet2/1/1description Connect to Switch2port link-type trunkport trunk allow-pass vlan 10 20undo shutdown…
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