
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
Cisco交换机设置点滴
Catalyst 1924/2820软件升级
一、使用TFTP server安装软件
通过网络为交换机更新软件,在服务器和交换机之间必须经由IP连接.
1.必须具有一台TFTP server(如运行TFTP server软件的PC机)和一台管理工作站(如一台PC机),并且可以通过console口管理交换机:
使用终端仿真程序(如win95的HyperTerminal)和RJ-45-to-RJ-45的连接电缆和适配器:
RJ-45-to-DB-9 female DTE 适配器(标记"Terminal"
RJ-45-to-DB-25 female DTE 适配器(标记"Terminal"
RJ-45-to-DB-25 male DCE 适配器(标记"Modem"
2.以下是通过TFTP server更新软件的步骤:
1)将Cisco Catalyst 1900/2820 软件存于管理工作站.
2)将TFTP根目录设置为软件所在目录.
3)打开交换机,交换机正常启动.
4)在终端窗口显示管理菜单画面(以下为管理菜单).
Management Console Main Menu
Catalyst 1900 - Main Menu
[C] Console Settings
[S] System
[N] Network Management
[P] Port Configuration
[A] Port Addressing
[D] Port Statistics Detail
[M] Monitoring
Bridge Group
[R] Multicast Registration
[F] Firmware
RS-232 Interface
Usage Summaries
[H] Help
[X] Exit Management Console
Enter Selection:
5)如交换机未赋予IP地址,应该使用菜单赋予交换机IP addresss, subnet mask, 和default gateway.
6)确认交换机和TFTP server之间的连接正常. 例如:从服务器PING交换机.
7)进入Firmware配置菜单, 选择[S]选项,并键入TFTP server的IP地址.
Catalyst 1900 - Firmware Configuration
-----------------System Information------------
FLASH: 1024K bytes
V6.00
Upgrade status:
No upgrade currently in progress.
--------------------Settings------------------
[S] Server: IP address of TFTP server 0.0.0.0
[F] Filename for firmware upgrades
[A] Accept upgrade transfer from other hosts Enabled
--------------------Actions-------------------
System XMODEM upgrade [D] Download test subsystem (XMODEM)
[T] System TFTP upgrade [X] Exit to Main Menu
Enter Selection:
8)选择[F]选项,键入TFTP server上的交换机软件的名称.
9)选择[T]选项执行 TFTP进行软件更新.
10)在菜单的系统信息区检查更新状态显示验证软件更新过程.
当软件更新完毕后,交换机大约有1分钟不响应命令,然后交换机重新启动并使用新的软件. |
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