Включение статической маршрутизации на Cisco 2960s

У Cisco были и есть замечательные коммутаторы 2/3 уровня — Cisco Catalist WS-C2960, которые можно использовать в качестве ядра небольшой «бюджетной» сети.

Для этого требуется статическая маршрутизация, которой в настройках по умолчанию нет.

 Как включить или разрешить статическую маршрутизацию в Cisco 2960S Lan Base?

На примере  WS-C2960S-24TS-L.

SW5-SRV#sh ver
Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE5, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Thu 09-Feb-12 19:22 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x01B00000

ROM: Bootstrap program is Alpha board boot loader
BOOTLDR: C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(55r)SE, RELEASE SOFTWARE (fc1)

SW5-SRV uptime is 19 minutes
System returned to ROM by power-on
System restarted at 18:18:53 AST Sun Dec 9 2012
System image file is "flash:/c2960s-universalk9-mz.122-55.SE5/c2960s-universalk9-mz.122-55.SE5.bin"

...

Смотрим разрешенные возможности по умолчанию:

SW5-SRV#sh sdm pre
The current template is "default" template.
The selected template optimizes the resources in
the switch to support this level of features for
0 routed interfaces and 255 VLANs.

number of unicast mac addresses: 8K
number of IPv4 IGMP groups: 0.25K
number of IPv6 multicast groups: 0.25K
number of IPv4/MAC qos aces: 0.375k
number of IPv4/MAC security aces: 0.375k
number of IPv6 policy based routing aces: 0
number of IPv6 qos aces: 0
number of IPv6 security aces: 0.125k

Пробуем включить статическую маршрутизацию:

SW5-SRV#ip routing
^
% Invalid input detected at '^' marker.

Cisco «не знает» такую команду… Научим,  переключаем режим sdm на lan-base:

SW5-SRV#conf  t
Enter configuration commands, one per line. End with CNTL/Z.
SW5-SRV(config)#sdm pref  lan
Changes to the running SDM preferences have been stored, but cannot take effect
until the next reload.
Use 'show sdm prefer' to see what SDM preference is currently active.

Сохраним конфигурацию:

SW5-SRV#wr
Building configuration...
[OK]
SW5-SRV#

После обязательной перезагрузки нужное появится.

SW5-SRV#reload

SW5-SRV#sh sdm pre
The current template is "lanbase-routing" template.
The selected template optimizes the resources in
the switch to support this level of features for
0 routed interfaces and 255 VLANs.

number of unicast mac addresses: 4K
number of IPv4 IGMP groups + multicast routes: 0.25K
number of IPv4 unicast routes: 4.875k
number of directly-connected IPv4 hosts: 4K
number of indirect IPv4 routes: 0.875k
number of IPv6 multicast groups: 0.25K
number of directly-connected IPv6 addresses: 0.25K
number of indirect IPv6 unicast routes: 0
number of IPv4 policy based routing aces: 0
number of IPv4/MAC qos aces: 0.375k
number of IPv4/MAC security aces: 0.375k
number of IPv6 policy based routing aces: 0
number of IPv6 qos aces: 0
number of IPv6 security aces: 0.125k

Теперь  у нас есть ip routing  на 16 статических маршрутов (читай строк маршрутов), DHCP сервер и прочие полезности.

SW5-SRV(config)#ip route ?
A.B.C.D Destination prefix
profile Enable IP routing table profile
static Allow static routes

SW5-SRV# conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW5-SRV(config)#ip ?
Global IP configuration subcommands:
access-list Named access-list
accounting-list Select hosts for which IP accounting information is kept
accounting-threshold Sets the maximum number of accounting entries
accounting-transits Sets the maximum number of transit entries
address-pool Specify default IP address pooling mechanism
admission Network Admission Control (NAC)
alias Alias an IP address to a TCP port
arp IP ARP global configuration
arp IP Arp features
auth-proxy Authentication Proxy
default-gateway Specify default gateway (if not routing IP)
device Device tracking
dhcp Configure DHCP server and relay parameters
dhcp-client Configure parameters for DHCP client operation
dhcp-server Specify address of DHCP server to use
domain IP DNS Resolver
domain-list Domain name to complete unqualified host names.
domain-lookup Enable IP Domain Name System hostname translation
domain-name Define the default domain name
finger finger server
ftp FTP configuration commands
gdp Router discovery mechanism
gratuitous-arps Generate gratuitous ARPs for PPP/SLIP peer addresses
host Add an entry to the ip hostname table
host-routing Enable host-based routing (proxy ARP and redirect)
hp-host Enable the HP proxy probe service
http HTTP server configuration
icmp ICMP options
igmp IGMP global configuration
local Specify local options
name-server Specify address of name server to use
options IP Options treatment
port-map Port to application mapping (PAM) configuration commands
radius RADIUS configuration commands
rcmd Rcmd commands
reflexive-list Reflexive access list
route Establish static routes
routing Enable IP routing
scp Scp commands
security Specify system wide security information
sla IP Service Level Agreement
source IP source
source-route Process packets with source routing header options
ssh Configure ssh options
sticky-arp Allow the creation of sticky ARP entries
subnet-zero Allow 'subnet zero' subnets
tacacs TACACS configuration commands
tcp Global TCP parameters
telnet Specify telnet options
tftp tftp configuration commands

Можем легко использовать Cisco Catalist WS C2960S в качестве надежного и недорогого ядра небольшой сети.

(С) eeg