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SCU 配置

date_range 18-Jan-25

配置 SCU

图 1: SCU 拓扑图SCU 拓扑图

图 1 显示了具有三个路由器的基本 SCU 配置。源路由器 A 和 B 使用环路地址作为要监控的前缀。大多数配置任务和实际监控发生在中转路由器 SCU 上。

在路由器 A 上开始配置。路由器 A 上的环路地址包含要分配给路由器 SCU 上的源类 A 的前缀的来源。但是,此路由器上不会发生任何 SCU 处理。因此,请为基本 OSPF 路由配置路由器 A,并在 OSPF 进程中包括您的环路接口和接口 so-0/0/2

路由器 A:

content_copy zoom_out_map
[edit]
interfaces {
    so-0/0/2 {
        unit 0 {
            family inet {
                address 10.255.50.2/24;
            }
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 10.255.192.10/32;
            }
        }
    }
}
protocols {
    ospf {
        area 0.0.0.0 {
            interface so-0/0/2.0;
            interface lo0.0;
        }
    }
}

在此示例中,路由器 SCU 处理大部分活动。在路由器 SCU 上,在层次结构级别的入站和出站接口 [edit interfaces interface-name unit unit-number family inet accounting] 上启用源类使用。请确保指定预期的流量:输入、输出,或者在本例中,两者兼而有之。

接下来,配置与路由器 A 和 B 的环路地址前缀匹配的路由过滤器策略语句。在策略中包含语句,用于将来自路由器 A 的数据包分类到一个名为的 scu-class-a 组中,将来自路由器 B 的数据包分类到名为 的第二个类 scu-class-b中。请注意有效使用包含多个术语的单个策略。

最后,将策略应用于转发表。

路由器 SCU

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[edit]
interfaces {
    so-0/0/1 {
        unit 0 {
            family inet {
                accounting {
                    source-class-usage {
                        input;
                        output;
                    }
                }
                address 10.255.50.1/24;
            }
        }
    }
    so-0/0/3 {
        unit 0 {
            family inet {
                accounting {
                    source-class-usage {
                        input;
                        output;
                    }
                }
                address 10.255.10.3/24;
            }
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 10.255.6.111/32;
            }
        }
    }
}
protocols {
    ospf {
        area 0.0.0.0 {
            interface so-0/0/1.0;
            interface so-0/0/3.0;
        }
    }
}
routing-options {
    forwarding-table {
        export scu-policy;
    }
}
policy-options {
    policy-statement scu-policy {
        term 0 {
            from {
                route-filter 10.255.192.0/24 orlonger;
            }
            then source-class scu-class-a;
        }
        term 1 {
            from {
                route-filter 10.255.165.0/24 orlonger;
            }
            then source-class scu-class-b;
        }
    }
}

完成路由器 B 上的配置任务。正如路由器 A 提供源前缀一样,路由器 B 的环路地址与路由器 SCU 上分配给 scu-class-b 的前缀匹配。同样,此路由器上不会发生 SCU 处理,因此请为基本 OSPF 路由配置路由器 B,并在 OSPF 进程中包括您的环路接口和接口 so-0/0/4

路由器 B:

content_copy zoom_out_map
[edit]
interfaces {
    so-0/0/4 {
        unit 0 {
            family inet {
                address 10.255.10.4/24;
            }
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 10.255.165.226/32;
            }
        }
    }
}
protocols {
    ospf {
        area 0.0.0.0 {
            interface so-0/0/4.0;
            interface lo0.0;
        }
    }
}

验证您的工作

要验证 SCU 是否正常运行,请使用以下命令:

  • show interfaces interface-name statistics

  • show interfaces interface-name extensive ( | detail

  • show routeextensive ( | detail

  • show interfaces source-class source-class-name interface-name

  • clear interface interface-name statistics

您应始终在配置 output 语句的出站 SCU 接口上验证 SCU 统计信息。您可以执行以下三个步骤来检查SCU的功能:

  1. 清除启用了 SCU 的路由器上的所有计数器,并验证它们是否为空。

  2. 从一个边缘路由器向另一个边缘路由器发送 ping,以在启用了 SCU 的路由器上生成 SCU 流量。

  3. 验证出站接口上的计数器是否正确递增。

以下部分显示了与配置示例一起使用的这些命令的输出。

content_copy zoom_out_map
user@scu> clear interfaces statistics all         

user@scu>  show interfaces so-0/0/1.0 statistics
  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119) 
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                       scu-class-a                    0                    0
                      scu-class-b                    0                    0
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.50/24, Local: 10.255.50.1

user@scu> show interfaces so-0/0/3.0 statistics
  Logical interface so-0/0/3.0 (Index 6) (SNMP ifIndex 113) 
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                      scu-class-a                    0                    0
                      scu-class-b                    0                    0
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.10/24, Local: 10.255.10.3

user@scu> show interfaces source-class scu-class-a so-0/0/3.0
    Protocol inet
      Source class                             Packets                Bytes
                      scu-class-a                    0                    0

user@scu> show interfaces source-class scu-class-b so-0/0/1.0
    Protocol inet
      Source class                             Packets                Bytes
                      scu-class-b                    0                    0

user@routerB> ping 10.255.192.10 source 10.255.165.226 rapid 10000

user@routerA> ping 10.255.165.226 source 10.255.192.10 rapid 10000

user@scu> show interfaces source-class scu-class-a so-0/0/3.0
    Protocol inet
      Source class                             Packets                Bytes
                      scu-class-a                20000              1680000

user@scu> show interfaces source-class scu-class-a so-0/0/1.0
    Protocol inet
      Source class                             Packets                Bytes
                      scu-class-b                20000              1680000

user@scu> show interfaces so-0/0/3.0 statistics
  Logical interface so-0/0/3.0 (Index 6) (SNMP ifIndex 113)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                      scu-class-a                20000              1680000
                      scu-class-b                    0                    0
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.10/24, Local: 10.255.10.3

user@scu> show interfaces so-0/0/1.0 statistics
  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                      scu-class-a                    0                    0
                      scu-class-b                20000              1680000
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.50/24, Local: 10.255.50.1

 

content_copy zoom_out_map
user@scu> show route extensive 10.255.192.0

inet.0: 26 destinations, 28 routes (25 active, 0 holddown, 1 hidden)
10.255.192.0/18 (1 entry, 1 announced)
TSI:
KRT in-kernel 10.255.192.0/18 -> {so-0/0/1.0}
Source class: scu-class-a
        *OSPF   Preference: 150
                Next hop: via so-0/0/1.0, selected
                State: <Active Int Ext>
                Age: 2:49:31  Metric: 0  Tag: 0 
                Task: OSPF
                Announcement bits (1): 0-KRT 
                AS path: I

 

content_copy zoom_out_map
user@scu> show route extensive 10.255.165.0         
inet.0: 26 destinations, 28 routes (25 active, 0 holddown, 1 hidden)
10.255.165.0/20 (1 entry, 1 announced)
TSI:
KRT in-kernel 10.255.165.0/20 -> {so-0/0/3.0}
Source class: scu-class-b
        *OSPF   Preference: 150
                Next hop: via so-0/0/3.0, selected
                State: <Active Int Ext>
                Age: 2:49:31  Metric: 0  Tag: 0 
                Task: OSPF
                Announcement bits (1): 0-KRT 
                AS path: I

 

content_copy zoom_out_map
user@scu> show interfaces so-0/0/1 detail         
Physical interface: so-0/0/1, Enabled, Physical link is Up
  Interface index: 12, SNMP ifIndex: 17, Generation: 11
  Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3,
  Loopback: None, FCS: 16, Payload scrambler: Enabled
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : Keepalives
  Hold-times     : Up 0 ms, Down 0 ms
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 46 (last seen 00:00:01 ago)
    Output: 45 (last sent 00:00:00 ago)
  LCP state: Opened
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
  Not-configured
  CHAP state: Not-configured
  Last flapped   : 2002-04-19 11:49:22 PDT (03:10:09 ago)
  Statistics last cleared: 2002-04-19 14:52:04 PDT (00:07:27 ago)
  Traffic statistics:
   Input  bytes  :              1689276                   40 bps
   Output bytes  :              1689747                   48 bps
   Input  packets:                20197                    0 pps
   Output packets:                20200                    0 pps
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                20053                20053                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                 146                  146                    0
  SONET alarms   : None
  SONET defects  : None
  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119) (Generation 3)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470          
      Flags: SCU-in, SCU-out
    Generation: 6 Route table: 0
       Source class                             Packets                Bytes
                      scu-class-a                    0                    0
                      scu-class-b                20000              1680000
      Filters: Input: icmp-so-0/0/1.0-i, Output: icmp-so-0/0/1.0-o
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.50/24, Local: 10.255.50.1, Broadcast: Unspecified,
        Generation: 8

user@scu>  show interfaces so-0/0/1 extensive
Physical interface: so-0/0/1, Enabled, Physical link is Up
  Interface index: 12, SNMP ifIndex: 17, Generation: 11
  Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: OC3,
  Loopback: None, FCS: 16, Payload scrambler: Enabled
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : Keepalives
  Hold-times     : Up 0 ms, Down 0 ms
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 51 (last seen 00:00:04 ago)
    Output: 50 (last sent 00:00:05 ago)
  LCP state: Opened
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
  Not-configured
  CHAP state: Not-configured
  Last flapped   : 2002-04-19 11:49:22 PDT (03:11:05 ago)
  Statistics last cleared: 2002-04-19 14:52:04 PDT (00:08:23 ago)
  Traffic statistics:
   Input  bytes  :              1689884                  264 bps
   Output bytes  :              1690388                  280 bps
   Input  packets:                20215                    0 pps
   Output packets:                20217                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0,
    Bucket drops: 0, Policed discards: 0, L3 incompletes: 0,
    L2 channel errors: 0, L2 mismatch timeouts: 0, HS link CRC errors: 0,
    HS link FIFO overflows: 0
  Output errors:
    Carrier transitions: 0, Errors: 0, Drops: 0, Aged packets: 0,
    HS link FIFO underflows: 0
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                20053                20053                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0                 
    3 network-cont                 164                  164                    0
  SONET alarms   : None
  SONET defects  : None
  SONET PHY:            Seconds        Count  State
    PLL Lock                  0            0  OK
    PHY Light                 0            0  OK
  SONET section:
    BIP-B1                    0            0
    SEF                       0            0  OK
    LOS                       0            0  OK
    LOF                       0            0  OK
    ES-S                      0
    SES-S                     0
    SEFS-S                    0
  SONET line:
    BIP-B2                    0            0
    REI-L                     0            0
    RDI-L                     0            0  OK
    AIS-L                     0            0  OK
    BERR-SF                   0            0  OK
    BERR-SD                   0            0  OK
    ES-L                      0
    SES-L                     0
    UAS-L                     0
    ES-LFE                    0
    SES-LFE                   0
    UAS-LFE                   0
  SONET path:
    BIP-B3                    0            0
    REI-P                     0            0
    LOP-P                     0            0  OK
    AIS-P                     0            0  OK
    RDI-P                     0            0  OK
    UNEQ-P                    0            0  OK
    PLM-P                     0            0  OK
    ES-P                      0
    SES-P                     0
    UAS-P                     0                    
    ES-PFE                    0
    SES-PFE                   0
    UAS-PFE                   0
  Received SONET overhead:
    F1      : 0x00, J0      : 0x00, K1      : 0x00, K2      : 0x00
    S1      : 0x00, C2      : 0xcf, C2(cmp) : 0xcf, F2      : 0x00
    Z3      : 0x00, Z4      : 0x00, S1(cmp) : 0x00, V5      : 0x00
    V5(cmp) : 0x00
  Transmitted SONET overhead:
    F1      : 0x00, J0      : 0x01, K1      : 0x00, K2      : 0x00
    S1      : 0x00, C2      : 0xcf, F2      : 0x00, Z3      : 0x00
    Z4      : 0x00, V5      : 0x00
  Received path trace: e so-0/0/1
    65 20 73 6f 2d 30 2f 30 2f 31 00 00 00 00 00 00   e so-0/0/1......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 0d 0a   ................
  Transmitted path trace: scu so-0/0/1
    67 68 62 20 73 6f 2d 30 2f 30 2f 31 00 00 00 00   scu so-0/0/1....
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
  HDLC configuration:
    Policing bucket: Disabled
    Shaping bucket : Disabled
    Giant threshold: 4484, Runt threshold: 3
  Packet Forwarding Engine configuration:
    Destination slot: 0, PLP byte: 1 (0x00)
    CoS transmit queue          Bandwidth          Buffer     Priority   Limit
                              %          bps   %        bytes
    0 best-effort             0            0   0            0      low    none
    1 expedited-forwarding    0            0   0            0      low    none
    2 assured-forwarding      0            0   0            0      low    none
    3 network-control         0            0   0            0      low    none
  Logical interface so-0/0/1.0 (Index 4) (SNMP ifIndex 119) (Generation 3)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Flags: SCU-in, SCU-out
    Generation: 6 Route table: 0
       Source class                             Packets                Bytes
                      scu-class-a                    0                    0
                      scu-class-b                20000              1680000
      Filters: Input: icmp-so-0/0/1.0-i, Output: icmp-so-0/0/1.0-o
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.50/24, Local: 10.255.50.1, Broadcast: Unspecified,
        Generation: 8
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