CISCO路由器10M接口做Trunk 

2610上使用IOS (tm) C2600 Software (C2600-IS-M), Version 12.0(3)T3, RELEASE SOFTWARE (fc1)，以太口支持VLAN Trunk，采用802.1Q封装，不能采用ISL封装
    以下是2610路由器通过10M以太网口做vlan路由的证明，由于在上面运行企业版IOS，与以后要安装2cE1,所以升级了flash与内存，不过由以下信息可见8M　flash与32M内存，完全可以做vlan路由(dot1q),我试了几个带ip plus功能集的IOS都可以做，当然也包括企业版IOS(见最后部份)

BAISE-NM-ROUTER#sh version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IS-M), Version 12.1(6), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Wed 27-Dec-00 20:52 by kellythw
Image text-base: 0x80008088, data-base: 0x80CB43D0

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

BAISE-NM-ROUTER uptime is 7 minutes
System returned to ROM by reload
System image file is "flash:c2600-is-mz.121-6.bin"

cisco 2610 (MPC860) processor (revision 0x203) with 53248K/12288K bytes of memor
y.
Processor board ID JAD05080HTZ (3375544961)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

BAISE-NM-ROUTER#sh flash

System flash directory:
File Length Name/status
1 7595252 c2600-is-mz.121-6.bin
[7595316 bytes used, 9181900 available, 16777216 total]
16384K bytes of processor board System flash (Read/Write)

BAISE-NM-ROUTER#sh run
Building configuration...

Current configuration : 1228 bytes
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname BAISE-NM-ROUTER
!
enable secret 5 $1$nK1s$4LGXrw/baBAx4bq74u//J0
!
!
!
!
!
ip subnet-zero
no ip finger
no ip domain-lookup
!
!
!
!
!
!
interface Ethernet0/0
no ip address
!
interface Ethernet0/0.1
!
interface Ethernet0/0.2
description OMC1
encapsulation dot1Q 2
ip address 10.184.6.30 255.255.255.224
!
interface Ethernet0/0.3
description HuaWei-OMC-S
encapsulation dot1Q 3
ip address 10.184.6.46 255.255.255.240
!
interface Ethernet0/0.4
description OMC3
encapsulation dot1Q 4
ip address 10.184.6.62 255.255.255.240
!
interface Ethernet0/0.5
description OMC4
encapsulation dot1Q 5
ip address 10.184.6.94 255.255.255.224
!
interface Ethernet0/0.6
description OMC5
encapsulation dot1Q 6
ip address 10.184.6.110 255.255.255.240
!
interface Ethernet0/0.7
description OMC5
encapsulation dot1Q 7
ip address 10.184.6.126 255.255.255.240
!
interface Serial0/0
description to nms7206

ip address 10.184.6.129 255.255.255.252
shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.184.6.130
no ip http server
!
!
line con 0
transport input none
line aux 0
line vty 0 4
password cisco
login
!
end

BAISE-NM-ROUTER#sh flash

System flash directory:
File Length Name/status
1 11613328 c2600-js-mz.122.bin
[11613392 bytes used, 5163824 available, 16777216 total]
16384K bytes of processor board System flash (Read/Write)

BAISE-NM-ROUTER#conf t
Enter configuration commands, one per line. End with CNTL/Z.
BAISE-NM-ROUTER(config)#int e0/0.1
BAISE-NM-ROUTER(config-subif)#encap ?
dot1Q IEEE 802.1Q Virtual LAN
sde IEEE 802.10 Virtual LAN - Secure Data Exchange

This feature is supported on these platforms:

Cisco 1710 router

Cisco 1751 router

Cisco 2600 series

Cisco 3600 series

Cisco 4000-M series (Cisco 4000-M, 4500-M, 4700-M)

Cisco 7200 series

RSP1Cisco 7505

RSP2Cisco 7507 and Cisco 7513

RSP4Cisco 7505, Cisco 7507, Cisco 7513, and Cisco 7576

25系列暂时还不支持！ 

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