SCU 配置
配置 SCU
图 1： 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：
[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
[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：
[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 statisticsshow interfaces interface-nameextensive（ |detail）show routeextensive（ |detail）show interfaces source-class source-class-name interface-nameclear 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：
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。
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。
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。
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
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
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
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