ciscocisco-7200vlan
I have cisco 7200 with 4 interfaces. Gi0/1 is my WAN where the ISP is sending me untagged and tagged traffic. Gi0/3 is my LAN interface.
Now I have vlan ID 2402. This vlan come from Gi0/1 and I want to resend it to Gi0/3. How can I do this?
interface GigabitEthernet0/1.1
no shutdown
encapsulation dot1Q 2402
!
interface GigabitEthernet0/3.1
no shutdown
encapsulation dot1Q 2402
!
How I connect these interfaces ? There is no switchport command….
I don't have SUP7 to test, but it works on SUP6 and SUP32, I would presume SUP7 retains this functionality.
I've tested between JNPR M320 <-> SUP32, and 'vlan mapping JNPR SUP32' works just fine.
There is no need for QinQ, what the QinQ option does is it adds top tag to one particularly tag. So switchport vlan mapping 1042 dot1q-tunnel 42 would map incoming [1042] stack to [42 1042] stack.
As opposed to switchport vlan mapping 1042 42 which maps incoming dot1q Vlan [1042] to dot1q Vlan [42].
JNPR M320 config:
{master}[edit interfaces ge-0/1/0 unit 1042]
user@m320# show
vlan-id 1042;
family inet {
address 10.42.42.1/24;
}
{master}[edit interfaces ge-0/1/0 unit 1042]
user@m320# run show interfaces ge-0/1/0
Physical interface: ge-0/1/0, Enabled, Physical link is Up
Interface index: 135, SNMP ifIndex: 506
Description: B: SUP32 ge5/1
Link-level type: Flexible-Ethernet, MTU: 9192, Speed: 1000mbps, BPDU Error: None,
MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled,
Auto-negotiation: Enabled, Remote fault: Online
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x4000
CoS queues : 8 supported, 8 maximum usable queues
Current address: 00:12:1e:d5:90:7f, Hardware address: 00:12:1e:d5:90:7f
Last flapped : 2013-02-19 09:14:29 UTC (19w6d 21:12 ago)
Input rate : 4560 bps (5 pps)
Output rate : 6968 bps (4 pps)
Active alarms : None
Active defects : None
Interface transmit statistics: Disabled
SUP32 config:
SUP32#show run int giga5/1
Building configuration...
Current configuration : 365 bytes
!
interface GigabitEthernet5/1
description F: M320 ge-0/1/0
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
switchport vlan mapping enable
switchport vlan mapping 1042 42
mtu 9216
bandwidth 1000000
speed nonegotiate
no cdp enable
spanning-tree portfast edge trunk
spanning-tree bpdufilter enable
end
SUP32#show ru int vlan42
Building configuration...
Current configuration : 61 bytes
!
interface Vlan42
ip address 10.42.42.2 255.255.255.0
end
SUP32#sh int GigabitEthernet5/1 vlan mapping
State: enabled
Original VLAN Translated VLAN
------------- ---------------
1042 42
SUP32#sh int vlan42
Vlan42 is up, line protocol is up
Hardware is EtherSVI, address is 0005.ddee.6000 (bia 0005.ddee.6000)
Internet address is 10.42.42.2/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:09, output 00:01:27, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
L2 Switched: ucast: 17 pkt, 1920 bytes - mcast: 0 pkt, 0 bytes
L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast
L3 out Switched: ucast: 0 pkt, 0 bytes mcast: 0 pkt, 0 bytes
38 packets input, 3432 bytes, 0 no buffer
Received 21 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
26 packets output, 2420 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
And
SUP32#ping 10.42.42.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.42.42.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
SUP32#sh arp | i 10.42.42.1
Internet 10.42.42.1 12 0012.1ed5.907f ARPA Vlan42
SUP32#show mac address-table dynamic address 0012.1ed5.907f
Legend: * - primary entry
age - seconds since last seen
n/a - not available
vlan mac address type learn age ports
------+----------------+--------+-----+----------+--------------------------
Active Supervisor:
* 450 0012.1ed5.907f dynamic Yes 0 Gi5/1
* 50 0012.1ed5.907f dynamic Yes 0 Gi5/1
* 40 0012.1ed5.907f dynamic Yes 0 Gi5/1
* 42 0012.1ed5.907f dynamic Yes 5 Gi5/1
user@m320# run ping 10.42.42.2 count 2
PING 10.42.42.2 (10.42.42.2): 56 data bytes
64 bytes from 10.42.42.2: icmp_seq=0 ttl=255 time=0.495 ms
64 bytes from 10.42.42.2: icmp_seq=1 ttl=255 time=0.651 ms
--- 10.42.42.2 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.495/0.573/0.651/0.078 ms
{master}[edit interfaces ge-0/1/0 unit 1042]
user@m320# run show arp no-resolve |match 10.42.42.2
00:05:dd:ee:60:00 10.42.42.2 ge-0/1/0.1042 none
Best practice wise - should I let the router or the ASA handle NAT (Overloading)?
In the most general of design best practices NAT is performed between an inside and outside network. NAT overloading is generally performed at the edge when there is limited public IP address space. You can learn more about NAT overloading, also known as Port Address Translation or PAT, in RFC 2663 (PAT is referred to as Network Address Port Translation (NAPT) in section 4.1.2).
In this particular scenario you can argue that you have two inside and outside networks and will need to perform some form of NAT on both the ASA (whether that is the NAT overloading you're using now, NAT exemption, static NAT, etc) and the Cisco Router.
I can ping the
172.16.2.2interface but not172.16.2.1from a pc connected to one of the layer 2 switches (proves intervlan routing is working -- i have a172.20.100.8address on the PC). Why can't I ping172.16.2.1from a PC but I can from the Layer 3 Switch?
The ASA 172.16.2.2 is receiving the ICMP echo-request but does not have a route back to 172.20.100.0/27. The echo-reply is actually being forwarded to the Router 172.16.1.1 via the default route.
And most of all -- Why can't I get out to the Internet from the Layer 3 switch?
Currently your ASA and Cisco Router do not have routes to internal devices other than their connected routes.
route outside 0.0.0.0 0.0.0.0 172.16.1.1 1
This will provide a default route via the outside interface, but how will the ASA know how to reach subnets residing behind the Layer 3 Distribution Switch?
You'll need to add routes to the internal subnets via the inside interface using the Layer 3 Distribution Switch as the next-hop IP address.
route inside 172.19.12.0 255.255.255.240 172.16.2.2
route inside 172.19.3.0 255.255.255.0 172.16.2.2
route inside 172.20.100.0 255.255.255.224 172.16.2.2
Further reading: ASA static routing
ip route 0.0.0.0 0.0.0.0 200.200.200.200
Additionally, how will your border router know how to reach subnets other than it's connected routes, and the catch all default route via the outside interface's next-hop address 200.200.200.200?
ip route 172.19.12.0 255.255.255.240 172.16.1.10
ip route 172.19.3.0 255.255.255.0 172.16.1.10
ip route 172.19.100.0 255.255.255.224 172.16.1.10
ip route 172.16.2.0 255.255.255.224 172.16.1.10
Further reading: ISR static routing
I cannot get an ip address right now from the DHCP server (Windows). Any insight into why?
Ensure you have end-to-end IP reachability between the client(s) sending DHCP discover messages and the DHCP server.
From what I can gather from your topology and configuration, the subnets 172.19.3.0/24, 172.19.12.0/28 and 172.20.100.0/27 should have no issues connecting to each other (assuming they are configured to use their respective default gateways) from a networking perspective.
You can remove the ip helper-address syntax from the SVI 100 given that the DHCP server is on the same segment and that command is used for a DHCP server(s) that is on a different segment.
interface Vlan100
ip address 172.20.100.1 255.255.255.224
ip helper-address 172.20.100.27
Best Answer
What you are looking for is best done with a bridge. Add the vlan tagged subinterface and the internal LAN interface to a bridge group, and it should work the way you want. (I've not done this for a long time. You're building an ethernet switch out of routed interfaces. This is the same thing done on a Cat-2948G-L3 -- I've seen CCIE's stumped by it until they get that it's a 48 port router.)
Another path would be policy routing. But I'm assuming the tagged traffic is not something that would be easily routed. (say, multicast IPTV traffic.)