我有一个思科877路由器,运行IOS版本12.4(24)T3,有4个以太网端口和多个外部IP地址附加到互联网连接。
我通常只是在外部地址到内部地址,但我必须为第三方安装一个Juniper防火墙,它必须直接连接到web,因为外部ip需要在防火墙的wan接口上配置。
所以我的问题是,我能否将一个外部IP绑定/桥接到路由器上的一个以太网端口,以便防火墙认为它可以直接连接到互联网?
show version
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(24)T3, RELEASE SOFTW
我正在使用互联网上的一些资源来学习处理器和主板设计,我遇到了错误: VHDL:语法错误接近尾声。我对此相当陌生,似乎不能指出错误所在。任何帮助都将不胜感激。
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity ROM is
port (
ADDR : in std_logic_vector (31 downto 0);
D_IN : in std_logic_vector (63 downto 0);
D_OUT : out std_logic_vecto
SELECT r.rom_ID
FROM rom r
WHERE r.rom_ID NOT LIKE(
SELECT r.rom_ID
FROM rom r, booking b
WHERE b.rom_ID = r.rom_ID
and (
'2018-05-08' BETWEEN b.ankomstdato AND b.utsjekkdato OR
'2018-05-12' BETWEEN b.ankomstdato AND b.utsjekkdato OR
我正在尝试用VHDL语言制作一个只读存储器,我正在使用我在上找到的这个模板:
library ieee;
use ieee.std_logic_1164.all;
entity ROM is
port ( address : in std_logic_vector(3 downto 0);
data : out std_logic_vector(7 downto 0) );
end entity ROM;
architecture behavioral of ROM is
type mem is array ( 0 to 2**4 - 1) of std_logic_vector
F#记录不能继承,但它们可以实现接口。例如,我希望创建不同的控制器:
type ControllerType =
| Basic
| Advanced1
| Advanced1RAM
| Advanced1RAMBattery
| Advanced2
// base abstract class
type IController =
abstract member rom : byte[]
abstract member ``type`` : ControllerType
type BasicController =
{ ro
例如,我有ROM的行为定义:
ENTITY rom_4x4_behavioral IS
PORT (address : IN NATURAL RANGE 0 TO 7;
q : OUT STD_LOGIC_VECTOR(3 DOWNTO 0));
END entity;
ARCHITECTURE rom_4x4_behavioral_arch OF rom_4x4_behavioral IS
SUBTYPE word IS STD_LOGIC_VECTOR(3 DOWNTO 0);
TYPE memory IS ARRAY(
我需要从定义的VHDL (.vhd)文件中读取数据。文件如下:
entity ROM is
port ( address : in std_logic_vector(3 downto 0);
data : out std_logic_vector(7 downto 0) );
end entity ROM;
architecture behavioral of ROM is
type ROM is array ( 0 to 2**4 - 1) of std_logic_vector(7 downto 0);
constant my_ROM : R