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初级工程师
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Cisco交换机集群技术 四
例:
atm pvc 0 256 rx-cttr 333 tx-cttr 333
c. 具体参数:
I) CBR:有两个参数,第一个是PCR,单位:KBPS; 另一个是cdvt(Cell Delay
Variation Tolerance ):指出可以在多久时间内连续转送信元,而无需严格按照
时间间隙。命令:
atm connection-traffic-table-row [index row-index] cbr pcr rate [cdvt
cdvt]
II) VBR-RT与VBR-NRT:用三个参数来描述:SCR 信元基本速率: 预计VC传送数据
所需要的大致速率; PCR 信元峰值速率: VC可以达到的最高速率; MBS最大突发转
输量: 设定VC会需要以最速率PCR传送多少KBPS后放缓。当通讯的速率在SCR以下
时正常发送;超过SCR但小*CR且不超过MBS的量也正常发送;超过 PCR或突发超过
MBS的量被视为违规的,按UPC(利用率参数控制)则处理。UPC有三种处理方法:drop
(丢弃) tag (加标记) 或 pass (转发)。命令:
atm connection-traffic-table-row [index row-index] {vbr-rt | vbr-nrt}
pcr rate {scr0 | scr10} scrval [mbs mbsval] [cdvt cdvtval]
scr0: 所有信元的CLP(cell loss priority)设为0,设为1时更可能被丢弃
scr10: 通讯流中的信元的CLP可以根据情况设为0或1
III) UBR:标准的UBR只有PCR参数,MCR是cisco的扩展(UBR+)。命令:
atm connection-traffic-table-row [index row-index] ubr pcr rate [cdvt
cdvtval] [mcr mcrval]
IV) ABR:有个参数,分别是PCR和MCR。命令:
atm connection-traffic-table-row [index row-index] abr pcr rate [cdvt
cdvtval] [mcr mcrval]
参考: Configuring Resource Management
Catalyst 4000, Catalyst 2948G, Catalyst 2980G升级
Step 1:
rommon 1 > show interface
me1: inet 172.20.58.227 netmask 255.255.255.0 broadcast 172.20.58.255
rommon 2 > show ip route
Destination Gateway Interface
----------------------- ----------------------- ---------
default 0.0.0.0 me1
Step 2: Set the default gateway, if needed.
rommon 3 > set ip route default 172.20.58.1
Step 3:
rommon 5 > set
PS1=rommon ! >
AutobootStatus=success
MemorySize=32
DiagBootMode=post
?=0
ROMVERSION=4.4(1)
WHICHBOOT=bootflash:cat4000.4-4-1.bin
BOOT=bootflash:cat4000.4-4-1.bin,1;
rommon 6 > Tftpserver=172.20.59.67
!--- Setting TFTP server variable.
rommon 7 > set
!---Verifying the setting.
PS1=rommon ! >
AutobootStatus=success
MemorySize=32
DiagBootMode=post
Tftpserver=172.20.59.67
?=0
ROMVERSION=4.4(1)
WHICHBOOT=bootflash:cat4000.4-4-1.bin
BOOT=bootflash:cat4000.4-4-1.bin,1;
Step 4: Netboot the system.
rommon 9 > boot cat4000.4-4-1.bin
Step 5: After netbooting the system, you will get the switch console.
Use the copy tftp Flash command to copy the valid image to the Flash
来源:江苏万和IT培训学校
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