Static route & floating Static route

Cisco


ip route next-hop address => admin distance of 1

ip route local exit interface => admin distance of 0 like connected interface

e.g. on R1 router

ip route 10.10.30.0 255.255.255.0 10.10.20.2 or

ip route 10.10.30.0 255.255.255.0 s0

** Adding the permanent keyword to a static route statement will keep the static routes in the routing table even if the interface goes down 

floating static route (Backup route)

ip route 10.10.30.0 255.255.255.0 s0

ip route 10.10.30.0 255.255.255.0 s0 91

when running eigrp which has a default AD of 90, eigrp route will appear in routing table and only when that route goes down will the floating static route appear. Serves as a backup route.


Juniper


set routing-options static route 10.10.30.0/24 next-hop 10.10.20.2


IPv6
Cisco - ipv6 route 2001:db8::/32 s0 fe80::1/64
Juniper - set routing-options rib inet6.0 static route 2001:200:20:1::1/128 next-hop 2001:200:30:2::2

Show Version

Router# show version
Cisco Internetwork Operating System Software IOS (tm) 3600 Software (C3640-J-M), Version 11.2(6)P, SHARED PLATFORM, RELEASE SOFTWARE (fc1) Copyright (c) 1986-1997 by cisco Systems, Inc. Compiled Mon 12-May-97 15:07 by tej Image text-base: 0x600088A0, data-base: 0x6075C000 ROM: System Bootstrap, Version 11.1(7)AX [kuong (7)AX], EARLY DEPLOYMENT RELEASE SOFTWARE (fc2) Router uptime is 1 week, 1 day, 38 minutes System restarted by power-on System image file is "flash:c3640-j-mz_112-6_P.bin", booted via flash Host configuration file is "3600_4-confg", booted via tftp from 171.69.83.194 cisco 3640 (R4700) processor (revision 0x00) with 107520K/23552K bytes of memory. Processor board ID 03084730 R4700 processor, Implementation 33, Revision 1.0 Bridging software. SuperLAT software copyright 1990 by Meridian Technology Corp). X.25 software, Version 2.0, NET2, BFE and GOSIP compliant. TN3270 Emulation software. Primary Rate ISDN software, Version 1.0. 2 Ethernet/IEEE 802.3 interface(s) 97 Serial network interface(s) 4 Channelized T1/PRI port(s) DRAM configuration is 64 bits wide with parity disabled. 125K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read/Write) Configuration register is 0x2102


IOS image version and features => c3640-j-mz_112-6_P.bin
Dynamic(Volatile) RAM => 107520K/23552K bytes total = 107520k + 23552k = 131072k
NVRAM => 125K
Flash memory => 16384K

Show command with pipe

show ip interface brief | exclude unassigned
=> show interface with IP address

show running-config | begin router
=> show routing protocol configuration

show ip protocols
=> show the various routing protocols configured, its participating network and its various running timer

show interface trunk
=> show the interface which are configured as trunk and using 802.1q or ISL encapsulation

show ip route
=>show the routing table
R => RIP
O => OSPF
D => EIGRP
B => BGP
C => connected
S => static
* => default route

Enable Port security

configure terminal

interface fast ethernet (port)

switchport mode access =>change dynamic to access mode

switchport port-security =>enable port security

switchport port-security mac-address sticky =>remember mac-address

switchport port-security maximum 1 =>only allow 1 mac address

switchport port-security violation shutdown =>shutdown if detect other mac

Enable faster convergence of switch

For port assign to PC, remember to enable portfast so that it will not be involve in the spanning tree re-calculation

configure terminal

interface fast ethernet (port)

spanning-tree portfast