Rewriting DSCP (ToS) values is tested on Cisco switch 3750: Ports Model SW Version SW Image ------ ------ ----------------- ------------ 52 WS-C3750G-48TS 12.2(25)SEE4 C3750-ADVIPSERVICESK By default QoS configuration is disabled: sw3750#sh mls qos QoS is disabled QoS ip packet dscp rewrite is enabled So we need to enable QoS: sw3750#conf t sw3750(config)#mls qos sw3750(config)#end sw3750#sh mls qos QoS is ...
Read more ›One simple method to backup Cisco’s configuration using SNMP and PERL. Download manually from search.cpan.org PERL library Cisco::CopyConfig . Another way of installing: perl -MCPAN -e 'install Cisco::CopyConfig' Cisco::CopyConfig provides methods for manipulating the running-config of devices running IOS via SNMP directed TFTP. This module is essentially a wrapper for Net::SNMP and the CISCO-CONFIG-COPY ...
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Cisco ME 3400 series switches are designed to meet the needs of Metro service providers. Introduce brand new concept and features to make the product easier to manage, deploy, and troubleshoot. One of new features is the new concept of UNI/NNI Port Types. UNI – User Network Interface NNI – Network Node Interface Based on the port type, certain features/behaviors are enabled or disabled to ease configuration ...
Read more ›First we need to allow multicast routing: ip multicast-routing distributed In our example we have two vlans: VLAN 3000 – clients that will receive multicast traffic VLAN 4000 – in this VLAN are sources of multicast traffic enter the following commands: ip igmp snooping querier ip igmp snooping vlan 3000 mrouter learn cgmp ip igmp snooping vlan 4000 mrouter learn cgmp According Cisco’s official documentation ...
Read more ›A brief tutorial how to configure dot.1q ( tagged vlan ) Layer3 interface on Cisco 1800 series. ( on WAN interface ). First will create vlan 777 in vlan database cisco1800#vlan database cisco1800(vlan)vlan 777 VLAN 777 added: Name: VLAN0777 cisco1800(vlan)# cisco1800(vlan)#vlan 777 name dot1q_vlan_on_WAN_interface VLAN 777 modified: Name: dot1q_vlan_on_WAN_interface Now verify vlan: cisco1800#show vlan-swit ...
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When Cisco discusses switching, they’re talking about layer 2 switching unless they say otherwise. Layer 2 switching is the process of using the hardware address of devices on a LAN to segment a network. Since you’ve got the basic ideas down, I’m now going to focus on the particulars of layer 2 switching and nail down how it works. Okay, you know that switching breaks up large collision domains into smaller ...
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