I had my shiny and tiny GCP network for EVE-NG to test vEOS. I built a new VM (vm2) to be my center for automation so I can test stuff like ansible\/napalm\/nornir etc… But I couldn’t ping from vm2 to the vEOS instances in eve-ng (vm1). Those instances where in a different network attached to vm1 so it had to “route”.<\/p>\n\n\n\n
As usual, I missed one step when I created the EVE-NG VM. The official documentation doesnt mention anything regarding enabling routing in the VM. As I am not used to Cloud environments, I assume that any simple Linux VM can forward traffic if configured.<\/p>\n\n\n\n
Surprise Surprise. In GCP (not sure in other cloud providers), you need to enable “forwarding” during the VM creation and you can’t change that afterwards in any way. <\/p>\n\n\n\n
After checking the second guide I followed, I realised that guide mentioned the point to enable forwarding to avoid the same problem I was facing…<\/p>\n\n\n\n
So I had to gave up and had to build both VMs from scratch….<\/p>\n\n\n\n
But at the end, I have routing enabled in both VMs and I can ping to the vEOS images.<\/p>\n\n\n\n
And another annoying thing. I couldnt update the next hop in a static route defined in the VPC. So I had to delete it and create again pointing to the new VM with the vEOS.<\/p>\n\n\n\n
And dealing with the internal IPs…<\/p>\n\n\n\n
Moving on, quite frustrating day. But learned several things about GCP netwoking.<\/p>\n","protected":false},"excerpt":{"rendered":"
I had my shiny and tiny GCP network for EVE-NG to test vEOS. I built a new VM (vm2) to be my center for automation so I can test stuff like ansible\/napalm\/nornir etc… But I couldn’t ping from vm2 to the vEOS instances in eve-ng (vm1). Those instances where in a different network attached to … Continue reading “GCP Networking 101 – IP Forwarding”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,2],"tags":[],"class_list":["post-220","post","type-post","status-publish","format-standard","hentry","category-aws","category-networks"],"_links":{"self":[{"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/posts\/220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/comments?post=220"}],"version-history":[{"count":2,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/posts\/220\/revisions"}],"predecessor-version":[{"id":222,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/posts\/220\/revisions\/222"}],"wp:attachment":[{"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/media?parent=220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/categories?post=220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.thomarite.uk\/index.php\/wp-json\/wp\/v2\/tags?post=220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}