Tutor
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16 Messages
IP Passthru static IP connecting to a Cisco3750x 10GB port
Hello - I am trying to connect my BGW320 into a 10GB port on a Cisco3750, then from another 10GB port on the 3750 goes to my ASUS AX11000 (with a static IP block /29 from AT&T). I have configured my ASUS router with the static IP information however, I cannot seem to get internet access when I go through my cisco switch.
I was reading the following thread https://forums.att.com/conversations/att-fiber-equipment/ip-passthrough-correct-setup-for-cisco-asa-with-multiple-networks/6241e2f0a7e2d409585c62eb but he has an ASA and I am using a L3 switch.
I want to make sure I am configuring the gateway properly (using or not using IP passthru, or using cascading router) before I dive into the cisco portion of it.
Any help is appreciate thank you!
JefferMC
ACE - Expert
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31.4K Messages
2 months ago
Does this work when the switch is not present?
How is your Static Block configured in the AT&T Gateway (e.g. as a local Subnet or as a Cascaded Router)?
I am confused by the IP address labels on your diagram: How can the Gateway's WAN IP be present on the LAN side of the Gateway?
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knightmare
Tutor
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16 Messages
2 months ago
Yes my current configuration does work but it is using the 1GB port on the 3750. The static block is configured as a local subnet on the gateway.
In the diagram I am trying to show the gateway pushing the WAN IP to the cisco switch(TE1) and also moving it out through the cisco switch (TE2) to the ASUS router.
The ASUS router is my main router and I simply want to utilize the 10GB ports on my 3750 instead of using the 1GB ports.
Hope this helps and sorry for the poor explanation.
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knightmare
Tutor
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16 Messages
2 months ago
Here is a diagram of my current layout and subnet config on the gateway if it helps
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JefferMC
ACE - Expert
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31.4K Messages
2 months ago
Okay, now I get what you're trying to do, I think. There's no particular reason why the switch should behave any differently from an Ethernet cable unless the 10 Gbps switch port won't negotiate with the 5 Gbps port on the Gateway.
Can you connect to the switch's GUI and see what the result of the port negotiation is between the switch and the Gateway. Check also on the Gateway side (Home Network > Status , look a the Transmit speed for the port under the LAN Ethernet Statistics). See if they agree.
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knightmare
Tutor
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16 Messages
2 months ago
Yea they agree. The gateway is showing a 5GB connection full duplex and it is up/up on the 3750 taking traffic now. I had to put one of the IPs from the /29 on TE1 and implement a route on the 3750 pointing to the DGW of the ATT gateway.
The connection stays up whether I have IP passthru enabled or not. Is that because I have manually configured the IP on the ASUS router?
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JefferMC
ACE - Expert
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31.4K Messages
2 months ago
I really tried to focus on the fact it was working, but now it isn't, and didn't really drive down on how you're configured. Can I ask Why you have a public static block?
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knightmare
Tutor
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16 Messages
2 months ago
It is working. Just thought there might be an explanation related to ip passthru and what would be recommended.... Guess there is not.
Thanks!
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JefferMC
ACE - Expert
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31.4K Messages
2 months ago
I cannot comment on IP Passthrough and Static Public IP block unless I know your configuration goals. There are two primary ways of setting up Static Blocks. IP Passthrough can interact with one of those two ways and can coexist with the other. When I layout the entire story, people misread/get confused and it takes longer overall to get them to the end point. So now I ask first what your goals are, and then I explain the relevant parts in detail and mention the other choices in passing.
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