常见网络故障诊断解析
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8
系统缓存
HoStage# show buffers Buffer elements: 500 in free list (500 max allowed) 51640224 hits, 0 misses, 0 created Small buffers, 104 bytes (total 121, permanent 121): 119 in free list (20 min, 250 max allowed) 19229201 hits, 0 misses, 0 trims, 0 created Middle buffers, 600 bytes (total 90, permanent 90): 89 in free list (10 min, 200 max allowed) 20513359 hits, 91 misses, 115 trims, 115 created Big buffers, 1524 bytes (total 90, permanent 90): 90 in free list (5 min, 300 max allowed) 7160285 hits, 0 misses, 0 trims, 0 created Large buffers, 5024 bytes (total 5, permanent 5): 5 in free list (0 min, 30 max allowed) 233295 hits, 0 misses, 0 trims, 0 created Huge buffers, 18024 bytes (total 0, permanent 0): 0 in free list (0 min, 4 max allowed) 0 hits, 0 misses, 0 trims, 0 created
Fra Baidu bibliotekEthernet ø 1 2 3
• • • •
Token Ring 1 1 2 3
• • • •
Global Pool
x
y
Interface Card
1, 2, 3… x
1, 2, 3… x
Interface Card
T1 Ex+2 Ex+1 Ex
E2
FDDI
T2 Ty
4
Ty+8
缓存和队列 (Input Drops)
设备维护和故障诊断
1
路由器设备 维护和故障诊断
2
Show Interface
3
缓存和队列(什么是 Ignore?)
System Buffers
• 当没有缓存可以被用来储存 输入的帧时，Ignore就会增 CPU 加 • 队列极限值可以被超过以便 处理突发的流量
Interface Bus
Packet Buffers
HoStage> show controller cbus cBus 0, controller type 6.0, microcode version 10.0 512 Kbytes of main memory, 128 Kbytes cache memory 134 1520 byte buffers, 65 4496 byte buffers Restarts: 0 line down, 0 hung output, 0 controller error MEC 0, controller type 5.1, microcode version 10.0 Interface 0 - Ethernet0, station address 0000.0c06.4ae0 (bia 0000.0c06.4ae0) 11 buffer RX queue threshold, 18 buffer TX queue limit, buffer size 1520 ift 0000, rql 11, tq 0000 0000, tql 18 Transmitter delay is 0 microseconds CTR 1, controller type 9.0, microcode version 10.1 Interface 8 - TokenRing0, station address 0000.3060.3219 (bia 0000.3060.3219) 13 buffer RX queue threshold, 31 buffer TX queue limit, buffer size 4496 ift 0005, rql 13 , tq 0000 0000, tql 31 Transmitter delay is 0 microseconds FDDI-T 3, controller type 7.2, microcode version 10.1 Interface 24 - Fddi0, station address 0000.0c06.36d7 (bia 0000.0c06.36d7) 13 buffer RX queue threshold, 32 buffer TX queue limit, buffer size 4496 ift 0006, rql 9 , tq 0000 0000, tql 32
6
缓存和队列(Output Drops)
System Buffers Interface Buffers
Token Ring 1
• • • • •
CPU
New Frame
• 当超出输出接口的队列极限 值时， Output drop值会增 加
Interface Bus
STOP
Token Ring
7
接口缓存
System Buffers Interface Buffers
Ethernet ø
Ethernet Frame 1
1, 2, 3… x
CPU
• • • • • • • • •
X
NO VACANCY
• 当没有足够的系统缓存可 用时Input drop值就会增 加 • 系统缓存被用作处理所有 经处理交换和路由器自身 生成的数据包
Interface Bus
5
缓存和队列(Output Drops)
System Buffers Interface Buffers
Token Ring
X
New Frame
CPU
NO VACANCY
• 当没有足够的接口缓存可用 作处理输出帧时，Output drop值便会增加
Interface Bus
系统缓存
HoStage# show buffers Buffer elements: 500 in free list (500 max allowed) 51640224 hits, 0 misses, 0 created Small buffers, 104 bytes (total 121, permanent 121): 119 in free list (20 min, 250 max allowed) 19229201 hits, 0 misses, 0 trims, 0 created Middle buffers, 600 bytes (total 90, permanent 90): 89 in free list (10 min, 200 max allowed) 20513359 hits, 91 misses, 115 trims, 115 created Big buffers, 1524 bytes (total 90, permanent 90): 90 in free list (5 min, 300 max allowed) 7160285 hits, 0 misses, 0 trims, 0 created Large buffers, 5024 bytes (total 5, permanent 5): 5 in free list (0 min, 30 max allowed) 233295 hits, 0 misses, 0 trims, 0 created Huge buffers, 18024 bytes (total 0, permanent 0): 0 in free list (0 min, 4 max allowed) 0 hits, 0 misses, 0 trims, 0 created
Fra Baidu bibliotekEthernet ø 1 2 3
• • • •
Token Ring 1 1 2 3
• • • •
Global Pool
x
y
Interface Card
1, 2, 3… x
1, 2, 3… x
Interface Card
T1 Ex+2 Ex+1 Ex
E2
FDDI
T2 Ty
4
Ty+8
缓存和队列 (Input Drops)
设备维护和故障诊断
1
路由器设备 维护和故障诊断
2
Show Interface
3
缓存和队列(什么是 Ignore?)
System Buffers
• 当没有缓存可以被用来储存 输入的帧时，Ignore就会增 CPU 加 • 队列极限值可以被超过以便 处理突发的流量
Interface Bus
Packet Buffers
HoStage> show controller cbus cBus 0, controller type 6.0, microcode version 10.0 512 Kbytes of main memory, 128 Kbytes cache memory 134 1520 byte buffers, 65 4496 byte buffers Restarts: 0 line down, 0 hung output, 0 controller error MEC 0, controller type 5.1, microcode version 10.0 Interface 0 - Ethernet0, station address 0000.0c06.4ae0 (bia 0000.0c06.4ae0) 11 buffer RX queue threshold, 18 buffer TX queue limit, buffer size 1520 ift 0000, rql 11, tq 0000 0000, tql 18 Transmitter delay is 0 microseconds CTR 1, controller type 9.0, microcode version 10.1 Interface 8 - TokenRing0, station address 0000.3060.3219 (bia 0000.3060.3219) 13 buffer RX queue threshold, 31 buffer TX queue limit, buffer size 4496 ift 0005, rql 13 , tq 0000 0000, tql 31 Transmitter delay is 0 microseconds FDDI-T 3, controller type 7.2, microcode version 10.1 Interface 24 - Fddi0, station address 0000.0c06.36d7 (bia 0000.0c06.36d7) 13 buffer RX queue threshold, 32 buffer TX queue limit, buffer size 4496 ift 0006, rql 9 , tq 0000 0000, tql 32
6
缓存和队列(Output Drops)
System Buffers Interface Buffers
Token Ring 1
• • • • •
CPU
New Frame
• 当超出输出接口的队列极限 值时， Output drop值会增 加
Interface Bus
STOP
Token Ring
7
接口缓存
System Buffers Interface Buffers
Ethernet ø
Ethernet Frame 1
1, 2, 3… x
CPU
• • • • • • • • •
X
NO VACANCY
• 当没有足够的系统缓存可 用时Input drop值就会增 加 • 系统缓存被用作处理所有 经处理交换和路由器自身 生成的数据包
Interface Bus
5
缓存和队列(Output Drops)
System Buffers Interface Buffers
Token Ring
X
New Frame
CPU
NO VACANCY
• 当没有足够的接口缓存可用 作处理输出帧时，Output drop值便会增加
Interface Bus