雜七雜八的小筆記!

[HP 1920G Switch] loopback-detection enable
[HP 1920G Switch] loopback-detection multi-port-mode enable
[HP 1920G Switch] loopback-detection interval-time 5

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* Copyright (c) 2010-2015 Hewlett-Packard Development Company, L.P. *
* Without the owner's prior written consent, *
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<HP 1920G Switch> _cmdline-mode on
All commands can be displayed and executed. Continue? [Y/N] Y

↓↓↓↓↓↓↓↓ Default password is below, ↓↓↓↓↓↓↓↓
Please input password: Jinhua1920unauthorized
y wrong use, please carefully use it with our engineer's direction.

Environment: N2048, N3048

Secnario: 我想設定第48 port為Trunk port(帶VLAN ID為1011 and 1012的Tags)

Solution: 在Switch加上以下這幾行

# enable
# configure
# vlan 1011,1012
# exit
# interface vlan 1011
# ip address 10.11.0.253 255.255.0.0
# exit
# interface vlan 1012
# ip address 10.12.0.253 255.255.0.0
# exit
# interface gigabitethernet 1/0/48
# switchport mode trunk
# switchport trunk allowed vlan 1011,1012

Environment: N2048, N3048

Secnario: 我想設定第1 port為Access port(帶VLAN ID為1011的Tags)

Solution: 在Switch加上以下這幾行

# enable
# configure
# vlan 1011
# exit
# interface vlan 1011
# ip address 10.11.0.253 255.255.0.0
# exit
# interface gigabitethernet 1/0/1
# switchport access vlan 1011

Environment: N3048

Secnario: 我想設定VLAN 1011與1012這兩個網段可以拿到VLAN 192網段192.168.1.1這台DHCP server發的IP

Solution: 在Switch加上以下這幾行，主要是設定要DHCP relay的VLAN與DHCP server的IP

# enable
# configure
# ip helper-address 192.168.1.1 dhcp
# dhcp l2relay vlan 1011,1012

Environment: N2048, N3048

Secnario: 所有接在N2048與N3048的機器都能互通，唯獨與Switch不同網段的機器連不到Switch(例如: 10.10.10.10要連到switch ip: 192.168.0.252)

Solution: 在Switch上加上以下這一行

# ip default-gateway 192.168.0.254

The Dell N3048 has to config below,

    1. add "VLAN interface IP"

    2. add "static route"

    3. add command "ip routing"

The Juniper SRX240 has to config below,

    - add a "interface IP", if the SRX240 is routing to N3048. 

Environment:

VLAN 1:

        VLAN 1 interface IP: 10.10.0.254/16

        Laptop A IP: 10.10.1.1/16

VLAN 2:

        VLAN 2 interface IP: 192.168.0.254/16

        Laptop B IP: 192.168.1.1/16

前提: switch的LLDP與SNMP皆有開啟

# snmpwalk -v2c -c public 192.168.0.21 1.0.8802.1.1.2.1.4.2.1.3

ALPHA AGS-24X switch開關ports的方法：
$ config ports 1 state enable
$ config ports 1 state disable

ALPHA AGS-24X switch看ports狀態的方法：
$ show ports 1
$ sh ports 1