Nexus 5500 CoPP類

簡介

本檔案介紹Nexus 5500控制平面保護(CoPP)類以及每個類所匹配的流量型別。

背景資訊

CoPP是通過NX-OS版本5.1(3)在Nexus 5500上引入的。 CoPP僅在Nexus 55xx上實施。在Nexus 50x0上不可用。

Nexus 5500 CoPP類及其流量型別

與Nexus 7000相比，Nexus 5500對CoPP的控制非常有限。無法完全刪除Nexus 5500 CoPP策略。使用者可以選擇三個預定義的策略，也可以建立自定義策略，因為無法從策略對映中刪除CoPP類。只能編輯承諾資訊速率(CIR)速率/突發大小。此外，不能定義新的CoPP類對映。

可能的CoPP策略對映包括：

• copp-system-policy-default
• copp-system-policy-scaled-l2
• copp-system-policy-scaled-l3
• copp-system-policy-customize

策略對映名稱不言自明。四個策略中只有一個可以同時應用。刪除任何策略將自動應用預設策略。

只能編輯copp-system-policy-customized。如果嘗試編輯前三個策略，則會返回錯誤：

Switch(config)# policy-map type control-plane copp-system-policy-scaled-l2
ERROR: Only copp-system-policy-customized can be modified
Switch(config)#

CoPP類

所有類對映都使用Match Protocol語句。

類對映不會顯示在運行配置中。運行配置中顯示的唯一與CoPP相關的配置是非預設自定義策略對映配置。例如：

Switch# sh run copp
!Command: show running-config copp
!Time: Tue Apr 30 20:20:00 2013

version 5.2(1)N1(2)
logging level copp 4
policy-map type control-plane copp-system-policy-customized
  class copp-system-class-arp
    police cir 5000 kbps bc 3600000 bytes
  class copp-system-class-default
    police cir 2048 kbps bc 6400000 bytes
control-plane
  service-policy input copp-system-policy-customized

Switch#

可以使用show class-map type control-plane或show policy-map interface control-plane檢查CoPP類對映。每條match語句旁邊都會提供說明：

Switch# show policy-map interface control-plane | i class-map|match    class-map copp-system-class-igmp (match-any)
      match protocol igmp  --> Matches on IGMP IP protocol number (2)
    class-map copp-system-class-pim-hello (match-any)
      match protocol pim --> Matches on PIM IP protocol number (103)
    class-map copp-system-class-bridging (match-any)
      match protocol bridging --> Matches on STP BPDUs
   class-map copp-system-class-arp (match-any)
      match protocol arp --> Matches on ARP Ethertype (0x806)
    class-map copp-system-class-dhcp (match-any)
      match protocol dhcp --> Matches on DHCP UDP port number (67, 68)
    class-map copp-system-class-mgmt (match-any)
      match protocol mgmt. --> Matches on Telnet, SSH, HTTP, SNMP, FTP, 
      NTP using their well-known ports
    class-map copp-system-class-lacp (match-any)
      match protocol lacp --> Matches LACP BPDU address and Ethertype 
     (01-80-C2-00-00-02, 0?8809)
    class-map copp-system-class-lldp (match-any)
      match protocol lldp_dcx --> Matches on LLDP ethertype (0x88CC)
    class-map copp-system-class-udld (match-any)
      match protocol udld --> Matches on UDLD destination address
    class-map copp-system-class-isis (match-any)
      match protocol isis_dce --> Matches on ISIS Ethertype
    class-map copp-system-class-msdp (match-any)
      match protocol msdp --> Matches on MSDP TCP port (639)
    class-map copp-system-class-cdp (match-any)
      match protocol cdp --> Matches on CDP destination address 0100.0ccc.cccc
    class-map copp-system-class-fip (match-any)
      match protocol fip --> Matches on FIP ethertype (0x8914)
    class-map copp-system-class-bgp (match-any)
      match protocol bgp --> Matches on BGP TCP port number (179)
    class-map copp-system-class-eigrp (match-any)
      match protocol eigrp --> Matches on EIGRP IP Protocol number (88)
    class-map copp-system-class-exception (match-any)
      match protocol exception --> IP options, Martian packets (same src and dst addresses)
    class-map copp-system-class-glean (match-any)
      match protocol glean --> Matches on Adjacency lookup miss 
    class-map copp-system-class-hsrp-vrrp (match-any)
      match protocol hsrp_vrrp --> Matches on HSRP & VRRP Destination IP  
    class-map copp-system-class-icmp-echo (match-any)
      match protocol icmp_echo --> Matches on ICMP type for echo
    class-map copp-system-class-ospf (match-any)
      match protocol ospf --> Matches on OSPF IP Protocol number (89)
    class-map copp-system-class-pim-register (match-any)
      match protocol reg --> Matches on PIM register packets
    class-map copp-system-class-rip (match-any)
      match protocol rip --> Matches on RIP UDP Port (520)
    class-map copp-system-class-l3dest-miss (match-any)
      match protocol unicast --> Miss in UFIB Lookup
    class-map copp-system-class-mcast-miss (match-any)
      match protocol multicast --> Miss in MFIB Lookup
    class-map copp-system-class-excp-ip-frag (match-any)
      match protocol ip_frag --> Matches on MTU-exceeded traffic
    class-map copp-system-class-excp-same-if (match-any)
      match protocol same-if --> Matches traffic to be sent via same ingress interface
    class-map copp-system-class-excp-ttl (match-any)
      match protocol ttl --> Matches on TTL=0/1
    class-map copp-system-class-default (match-any)
      match protocol default --> Matches packets not matched by previous classes
Switch#

CoPP類對映在5.2版中已得到增強，以匹配對應的IPv6控制資料包：

class-map type control-plane match-any copp-system-class-arp
      match protocol nd
class-map type control-plane match-any copp-system-class-eigrp
      match protocol eigrp6
class-map type control-plane match-any copp-system-class-hsrp-vrrp
      match protocol hsrp6
class-map type control-plane match-any copp-system-class-ospf
      match protocol ospf3