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​MPLS QoS - Default Operations

Picture
By default, whenever any QoS marked traffic is sent into an SP environment, it is maintained from the source device until it hits the destination device.

We'll Telnet from IOS17 to IOS18 and look at wireshark outputs from CSR1 towards CSR3 and then CSR5 out to IOS18.


IOS17#telnet 10.101.18.18 /source-interface loopback 101
​IOS18>en
% No password set
Picture
The above output shows the MPLS header with EXP 6.
Picture
Here we see that the CS6 IPv4 packet header is visible.


IOS18# show ip access-lists 
Extended IP access list QOS
    10 permit ip any any dscp cs1
    20 permit ip any any dscp cs2
    30 permit ip any any dscp cs3
    40 permit ip any any dscp cs4
    50 permit ip any any dscp cs5
    60 permit ip any any dscp cs6 (250 matches)
    70 permit ip any any dscp cs7
    80 permit ip any any
Extended IP access list QoS_MARKINGS
    10 permit tcp any eq telnet any
    15 permit tcp any any eq telnet (26 matches)
    20 permit ip any any (77 matches)

​
IOS18#show policy-map control-plane input 
 Control Plane 

  Service-policy input: PM_COPP

    Class-map: CM_COPP (match-any)  
      250 packets, 17469 bytes
      5 minute offered rate 0000 bps
      Match: access-group name QOS
        250 packets, 17469 bytes
        5 minute rate 0 bps

    Class-map: class-default (match-any)  
      213 packets, 24513 bytes
      5 minute offered rate 0000 bps, drop rate 0000 bps
      Match: any 
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  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto